21050021335413 has 32 divisors (see below), whose sum is σ = 33783653062656. Its totient is φ = 11398072707648.

The previous prime is 21050021335349. The next prime is 21050021335423. The reversal of 21050021335413 is 31453312005012.

It is not a de Polignac number, because 21050021335413 - 2⁶ = 21050021335349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21050021335423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 203601706 + ... + 203705067.

It is an arithmetic number, because the mean of its divisors is an integer number (1055739158208).

Almost surely, 2^{21050021335413} is an apocalyptic number.

21050021335413 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21050021335413 is a deficient number, since it is larger than the sum of its proper divisors (12733631727243).

21050021335413 is a wasteful number, since it uses less digits than its factorization.

21050021335413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407306913.

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 21050021335413 in words is "twenty-one trillion, fifty billion, twenty-one million, three hundred thirty-five thousand, four hundred thirteen".