21013145094 has 16 divisors (see below), whose sum is σ = 43051322160. Its totient is φ = 6833543040.

The previous prime is 21013145081. The next prime is 21013145149. The reversal of 21013145094 is 49054131012.

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, 42709399 + ... + 42709890.

It is an arithmetic number, because the mean of its divisors is an integer number (2690707635).

Almost surely, 2^21013145094 is an apocalyptic number.

21013145094 is an abundant number, since it is smaller than the sum of its proper divisors (22038177066).

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

21013145094 is a wasteful number, since it uses less digits than its factorization.

21013145094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85419335.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 21013145094 in words is "twenty-one billion, thirteen million, one hundred forty-five thousand, ninety-four".