20021531513200 has 60 divisors (see below), whose sum is σ = 54973405105360. Its totient is φ = 6864525089280.

The previous prime is 20021531513141. The next prime is 20021531513219. The reversal of 20021531513200 is 231513512002.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent 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, 3575270685 + ... + 3575276284.

Almost surely, 2^{20021531513200} is an apocalyptic number.

20021531513200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021531513200 is an abundant number, since it is smaller than the sum of its proper divisors (34951873592160).

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

20021531513200 is a wasteful number, since it uses less digits than its factorization.

20021531513200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7150546994 (or 7150546983 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 20021531513200 in words is "twenty trillion, twenty-one billion, five hundred thirty-one million, five hundred thirteen thousand, two hundred".