21916151672 has 32 divisors (see below), whose sum is σ = 42522278400. Its totient is φ = 10577099904.

The previous prime is 21916151633. The next prime is 21916151689. The reversal of 21916151672 is 27615161912.

It is a happy number.

It is a super-2 number, since 2×21916151672² (a number of 21 digits) contains 22 as substring.

It is a congruent 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, 908438 + ... + 932250.

It is an arithmetic number, because the mean of its divisors is an integer number (1328821200).

Almost surely, 2^21916151672 is an apocalyptic number.

It is an amenable number.

21916151672 is a deficient number, since it is larger than the sum of its proper divisors (20606126728).

21916151672 is a wasteful number, since it uses less digits than its factorization.

21916151672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27815 (or 27811 counting only the distinct ones).

The product of its digits is 45360, while the sum is 41.

The spelling of 21916151672 in words is "twenty-one billion, nine hundred sixteen million, one hundred fifty-one thousand, six hundred seventy-two".