21887672516 has 24 divisors (see below), whose sum is σ = 42691128480. Its totient is φ = 9757971072.

The previous prime is 21887672507. The next prime is 21887672531. The reversal of 21887672516 is 61527678812.

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, 8469170 + ... + 8471753.

It is an arithmetic number, because the mean of its divisors is an integer number (1778797020).

Almost surely, 2^21887672516 is an apocalyptic number.

It is an amenable number.

21887672516 is a deficient number, since it is larger than the sum of its proper divisors (20803455964).

21887672516 is a wasteful number, since it uses less digits than its factorization.

21887672516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16940963 (or 16940961 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 53.

The spelling of 21887672516 in words is "twenty-one billion, eight hundred eighty-seven million, six hundred seventy-two thousand, five hundred sixteen".