21516151120500 has 48 divisors (see below), whose sum is σ = 62655032067264. Its totient is φ = 5737640298400.

The previous prime is 21516151120489. The next prime is 21516151120523. The reversal of 21516151120500 is 502115161512.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 7172048874 + ... + 7172051873.

It is an arithmetic number, because the mean of its divisors is an integer number (1305313168068).

Almost surely, 2^{21516151120500} is an apocalyptic number.

21516151120500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21516151120500 is an abundant number, since it is smaller than the sum of its proper divisors (41138880946764).

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

21516151120500 is a wasteful number, since it uses less digits than its factorization.

21516151120500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14344100769 (or 14344100757 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 30.

The spelling of 21516151120500 in words is "twenty-one trillion, five hundred sixteen billion, one hundred fifty-one million, one hundred twenty thousand, five hundred".