21141672536 has 32 divisors (see below), whose sum is σ = 39873319200. Its totient is φ = 10508931840.

The previous prime is 21141672527. The next prime is 21141672553. The reversal of 21141672536 is 63527614112.

It is a self number, because there is not a number n which added to its sum of digits gives 21141672536.

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, 1223525 + ... + 1240683.

It is an arithmetic number, because the mean of its divisors is an integer number (1246041225).

Almost surely, 2^21141672536 is an apocalyptic number.

It is an amenable number.

21141672536 is a deficient number, since it is larger than the sum of its proper divisors (18731646664).

21141672536 is a wasteful number, since it uses less digits than its factorization.

21141672536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18059 (or 18055 counting only the distinct ones).

The product of its digits is 60480, while the sum is 38.

The spelling of 21141672536 in words is "twenty-one billion, one hundred forty-one million, six hundred seventy-two thousand, five hundred thirty-six".