21365560273146 has 16 divisors (see below), whose sum is σ = 42731773924800. Its totient is φ = 7121744527968.

The previous prime is 21365560273129. The next prime is 21365560273153. The reversal of 21365560273146 is 64137206556312.

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, 26798491 + ... + 27584238.

It is an arithmetic number, because the mean of its divisors is an integer number (2670735870300).

Almost surely, 2^{21365560273146} is an apocalyptic number.

21365560273146 is an abundant number, since it is smaller than the sum of its proper divisors (21366213651654).

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

21365560273146 is a wasteful number, since it uses less digits than its factorization.

21365560273146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54448213.

The product of its (nonzero) digits is 5443200, while the sum is 51.

The spelling of 21365560273146 in words is "twenty-one trillion, three hundred sixty-five billion, five hundred sixty million, two hundred seventy-three thousand, one hundred forty-six".