21345142364063 has 72 divisors (see below), whose sum is σ = 27098726602032. Its totient is φ = 16751993626368.

The previous prime is 21345142364017. The next prime is 21345142364083. The reversal of 21345142364063 is 36046324154312.

It is not a de Polignac number, because 21345142364063 - 2³⁶ = 21276422887327 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21345142364083) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 62643731 + ... + 62983547.

It is an arithmetic number, because the mean of its divisors is an integer number (376371202806).

Almost surely, 2^{21345142364063} is an apocalyptic number.

21345142364063 is a deficient number, since it is larger than the sum of its proper divisors (5753584237969).

21345142364063 is a wasteful number, since it uses less digits than its factorization.

21345142364063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339989 (or 339963 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 44.

The spelling of 21345142364063 in words is "twenty-one trillion, three hundred forty-five billion, one hundred forty-two million, three hundred sixty-four thousand, sixty-three".