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20879327972 = 2216785336643
BaseRepresentation
bin10011011100100000…
…010100001011100100
31222220010010202110102
4103130200110023210
5320230101443342
613331500243232
71336260234206
oct233440241344
958803122412
1020879327972
118944922158
124068540518
131c79914049
141020dc0776
15823062832
hex4dc8142e4

20879327972 has 24 divisors (see below), whose sum is σ = 36801715776. Its totient is φ = 10364702688.

The previous prime is 20879327969. The next prime is 20879327977. The reversal of 20879327972 is 27972397802.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (20879327977) 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, 551483 + ... + 588125.

It is an arithmetic number, because the mean of its divisors is an integer number (1533404824).

Almost surely, 220879327972 is an apocalyptic number.

It is an amenable number.

20879327972 is a deficient number, since it is larger than the sum of its proper divisors (15922387804).

20879327972 is a wasteful number, since it uses less digits than its factorization.

20879327972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37667 (or 37665 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 56.

The spelling of 20879327972 in words is "twenty billion, eight hundred seventy-nine million, three hundred twenty-seven thousand, nine hundred seventy-two".

Divisors: 1 2 4 167 334 668 853 1706 3412 36643 73286 142451 146572 284902 569804 6119381 12238762 24477524 31256479 62512958 125025916 5219831993 10439663986 20879327972