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25319010380 = 2257117830289
BaseRepresentation
bin10111100101001000…
…010111000001001100
32102100112011222210012
4113211020113001030
5403323131313010
615344214132352
71554300015536
oct274510270114
972315158705
1025319010380
11a812a15274
124aa73510b8
13250665c161
1413228a8856
159d2bd9005
hex5e521704c

25319010380 has 24 divisors (see below), whose sum is σ = 53918796960. Its totient is φ = 9984961280.

The previous prime is 25319010373. The next prime is 25319010389. The reversal of 25319010380 is 8301091352.

It is not an unprimeable number, because it can be changed into a prime (25319010389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8913725 + ... + 8916564.

It is an arithmetic number, because the mean of its divisors is an integer number (2246616540).

Almost surely, 225319010380 is an apocalyptic number.

25319010380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25319010380 is an abundant number, since it is smaller than the sum of its proper divisors (28599786580).

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

25319010380 is a wasteful number, since it uses less digits than its factorization.

25319010380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17830369 (or 17830367 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 25319010380 in words is "twenty-five billion, three hundred nineteen million, ten thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 71 142 284 355 710 1420 17830289 35660578 71321156 89151445 178302890 356605780 1265950519 2531901038 5063802076 6329752595 12659505190 25319010380