21365516374476 has 12 divisors (see below), whose sum is σ = 49852871540472. Its totient is φ = 7121838791488.

The previous prime is 21365516374451. The next prime is 21365516374483. The reversal of 21365516374476 is 67447361556312.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890229848925 + ... + 890229848948.

It is an arithmetic number, because the mean of its divisors is an integer number (4154405961706).

Almost surely, 2^{21365516374476} is an apocalyptic number.

It is an amenable number.

21365516374476 is an abundant number, since it is smaller than the sum of its proper divisors (28487355165996).

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

21365516374476 is a wasteful number, since it uses less digits than its factorization.

21365516374476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780459697880 (or 1780459697878 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 60.

The spelling of 21365516374476 in words is "twenty-one trillion, three hundred sixty-five billion, five hundred sixteen million, three hundred seventy-four thousand, four hundred seventy-six".