21513741464501 has 32 divisors (see below), whose sum is σ = 25708881824640. Its totient is φ = 17743625222400.

The previous prime is 21513741464461. The next prime is 21513741464513. The reversal of 21513741464501 is 10546414731512.

It is not a de Polignac number, because 21513741464501 - 2⁴² = 17115694953397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513741464101) 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, 38711471 + ... + 39263283.

It is an arithmetic number, because the mean of its divisors is an integer number (803402557020).

Almost surely, 2^{21513741464501} is an apocalyptic number.

It is an amenable number.

21513741464501 is a deficient number, since it is larger than the sum of its proper divisors (4195140360139).

21513741464501 is a wasteful number, since it uses less digits than its factorization.

21513741464501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556517.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 21513741464501 in words is "twenty-one trillion, five hundred thirteen billion, seven hundred forty-one million, four hundred sixty-four thousand, five hundred one".