21907151272 has 32 divisors (see below), whose sum is σ = 41369961600. Its totient is φ = 10875240000.

The previous prime is 21907151249. The next prime is 21907151309. The reversal of 21907151272 is 27215170912.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3078054 + ... + 3085162.

It is an arithmetic number, because the mean of its divisors is an integer number (1292811300).

Almost surely, 2^21907151272 is an apocalyptic number.

It is an amenable number.

21907151272 is a deficient number, since it is larger than the sum of its proper divisors (19462810328).

21907151272 is a wasteful number, since it uses less digits than its factorization.

21907151272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9817 (or 9813 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 37.

The spelling of 21907151272 in words is "twenty-one billion, nine hundred seven million, one hundred fifty-one thousand, two hundred seventy-two".