21329274900 has 36 divisors (see below), whose sum is σ = 61712702912. Its totient is φ = 5687806560.

The previous prime is 21329274899. The next prime is 21329274913. The reversal of 21329274900 is 947292312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35548492 + ... + 35549091.

Almost surely, 2^21329274900 is an apocalyptic number.

21329274900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21329274900 is an abundant number, since it is smaller than the sum of its proper divisors (40383428012).

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

21329274900 is a wasteful number, since it uses less digits than its factorization.

21329274900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71097600 (or 71097593 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The spelling of 21329274900 in words is "twenty-one billion, three hundred twenty-nine million, two hundred seventy-four thousand, nine hundred".