21160176272 has 160 divisors (see below), whose sum is σ = 46574161920. Its totient is φ = 9262978560.

The previous prime is 21160176263. The next prime is 21160176287. The reversal of 21160176272 is 27267106112.

It is a super-2 number, since 2×21160176272² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68038997 + ... + 68039307.

It is an arithmetic number, because the mean of its divisors is an integer number (291088512).

Almost surely, 2^21160176272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21160176272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23287080960).

21160176272 is an abundant number, since it is smaller than the sum of its proper divisors (25413985648).

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

21160176272 is a wasteful number, since it uses less digits than its factorization.

21160176272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The spelling of 21160176272 in words is "twenty-one billion, one hundred sixty million, one hundred seventy-six thousand, two hundred seventy-two".