21533897676 has 48 divisors (see below), whose sum is σ = 51150003968. Its totient is φ = 7049160000.

The previous prime is 21533897669. The next prime is 21533897687. The reversal of 21533897676 is 67679833512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447801 + ... + 493551.

Almost surely, 2^21533897676 is an apocalyptic number.

It is an amenable number.

21533897676 is an abundant number, since it is smaller than the sum of its proper divisors (29616106292).

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

21533897676 is a wasteful number, since it uses less digits than its factorization.

21533897676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46462 (or 46460 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 57.

The spelling of 21533897676 in words is "twenty-one billion, five hundred thirty-three million, eight hundred ninety-seven thousand, six hundred seventy-six".