21729036300 has 36 divisors (see below), whose sum is σ = 62869345896. Its totient is φ = 5794409600.

The previous prime is 21729036299. The next prime is 21729036311. The reversal of 21729036300 is 363092712.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36214761 + ... + 36215360.

Almost surely, 2^21729036300 is an apocalyptic number.

21729036300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21729036300 is an abundant number, since it is smaller than the sum of its proper divisors (41140309596).

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

21729036300 is a wasteful number, since it uses less digits than its factorization.

21729036300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72430138 (or 72430131 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 33.

The spelling of 21729036300 in words is "twenty-one billion, seven hundred twenty-nine million, thirty-six thousand, three hundred".