21116585754474 has 32 divisors (see below), whose sum is σ = 48290153564160. Its totient is φ = 6030351235632.

The previous prime is 21116585754413. The next prime is 21116585754521. The reversal of 21116585754474 is 47445758561112.

It is a super-2 number, since 2×21116585754474² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123204174 + ... + 123375449.

It is an arithmetic number, because the mean of its divisors is an integer number (1509067298880).

Almost surely, 2^{21116585754474} is an apocalyptic number.

21116585754474 is an abundant number, since it is smaller than the sum of its proper divisors (27173567809686).

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

21116585754474 is a wasteful number, since it uses less digits than its factorization.

21116585754474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246581674.

The product of its digits is 37632000, while the sum is 60.

The spelling of 21116585754474 in words is "twenty-one trillion, one hundred sixteen billion, five hundred eighty-five million, seven hundred fifty-four thousand, four hundred seventy-four".