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18801034680 = 2335125172
BaseRepresentation
bin10001100000101000…
…010000010110111000
31210112021110112000210
4101200220100112320
5302001031102210
612345335231120
71233623105121
oct214050202670
953467415023
1018801034680
117a7876a69a
1237885184a0
131a081863bc
14ca4d85048
15750886e20
hex460a105b8

18801034680 has 48 divisors (see below), whose sum is σ = 56407610520. Its totient is φ = 5013208704.

The previous prime is 18801034669. The next prime is 18801034691. The reversal of 18801034680 is 8643010881.

It is an interprime number because it is at equal distance from previous prime (18801034669) and next prime (18801034691).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1495782 + ... + 1508298.

Almost surely, 218801034680 is an apocalyptic number.

18801034680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18801034680 is an abundant number, since it is smaller than the sum of its proper divisors (37606575840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18801034680 is an frugal number, since it uses more digits than its factorization.

18801034680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25048 (or 12527 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 18801034680 in words is "eighteen billion, eight hundred one million, thirty-four thousand, six hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 12517 25034 37551 50068 62585 75102 100136 125170 150204 187755 250340 300408 375510 500680 751020 1502040 156675289 313350578 470025867 626701156 783376445 940051734 1253402312 1566752890 1880103468 2350129335 3133505780 3760206936 4700258670 6267011560 9400517340 18801034680