21515452014534 has 16 divisors (see below), whose sum is σ = 43359384214080. Its totient is φ = 7117070640680.

The previous prime is 21515452014517. The next prime is 21515452014547. The reversal of 21515452014534 is 43541025451512.

It is a congruent number.

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, 13686673524 + ... + 13686675095.

It is an arithmetic number, because the mean of its divisors is an integer number (2709961513380).

Almost surely, 2^{21515452014534} is an apocalyptic number.

21515452014534 is an abundant number, since it is smaller than the sum of its proper divisors (21843932199546).

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

21515452014534 is a wasteful number, since it uses less digits than its factorization.

21515452014534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27373348755.

The product of its (nonzero) digits is 480000, while the sum is 42.

The spelling of 21515452014534 in words is "twenty-one trillion, five hundred fifteen billion, four hundred fifty-two million, fourteen thousand, five hundred thirty-four".