21413664640254 has 32 divisors (see below), whose sum is σ = 45587931840000. Its totient is φ = 6686229996864.

The previous prime is 21413664640211. The next prime is 21413664640307. The reversal of 21413664640254 is 45204646631412.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1055266054 + ... + 1055286345.

It is an arithmetic number, because the mean of its divisors is an integer number (1424622870000).

Almost surely, 2^{21413664640254} is an apocalyptic number.

21413664640254 is an abundant number, since it is smaller than the sum of its proper divisors (24174267199746).

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

21413664640254 is a wasteful number, since it uses less digits than its factorization.

21413664640254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110552512.

The product of its (nonzero) digits is 3317760, while the sum is 48.

The spelling of 21413664640254 in words is "twenty-one trillion, four hundred thirteen billion, six hundred sixty-four million, six hundred forty thousand, two hundred fifty-four".