21514005554020 has 24 divisors (see below), whose sum is σ = 51633613329984. Its totient is φ = 7376230475616.

The previous prime is 21514005553921. The next prime is 21514005554057. The reversal of 21514005554020 is 2045550041512.

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, 76835733982 + ... + 76835734261.

It is an arithmetic number, because the mean of its divisors is an integer number (2151400555416).

Almost surely, 2^{21514005554020} is an apocalyptic number.

21514005554020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21514005554020 is an abundant number, since it is smaller than the sum of its proper divisors (30119607775964).

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

21514005554020 is a wasteful number, since it uses less digits than its factorization.

21514005554020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153671468259 (or 153671468257 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 34.

Adding to 21514005554020 its reverse (2045550041512), we get a palindrome (23559555595532).

The spelling of 21514005554020 in words is "twenty-one trillion, five hundred fourteen billion, five million, five hundred fifty-four thousand, twenty".