21214036504220 has 48 divisors (see below), whose sum is σ = 51438571020480. Its totient is φ = 7198400600064.

The previous prime is 21214036504109. The next prime is 21214036504253. The reversal of 21214036504220 is 2240563041212.

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, 781062875 + ... + 781090034.

It is an arithmetic number, because the mean of its divisors is an integer number (1071636896260).

Almost surely, 2^{21214036504220} is an apocalyptic number.

21214036504220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21214036504220 is an abundant number, since it is smaller than the sum of its proper divisors (30224534516260).

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

21214036504220 is a wasteful number, since it uses less digits than its factorization.

21214036504220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562153022 (or 1562153020 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 21214036504220 its reverse (2240563041212), we get a palindrome (23454599545432).

The spelling of 21214036504220 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred four thousand, two hundred twenty".