21613357755474 has 16 divisors (see below), whose sum is σ = 44395005119808. Its totient is φ = 7009737650352.

The previous prime is 21613357755467. The next prime is 21613357755481. The reversal of 21613357755474 is 47455775331612.

It is an interprime number because it is at equal distance from previous prime (21613357755467) and next prime (21613357755481).

It is a super-2 number, since 2×21613357755474² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48678733462 + ... + 48678733905.

It is an arithmetic number, because the mean of its divisors is an integer number (2774687819988).

Almost surely, 2^{21613357755474} is an apocalyptic number.

21613357755474 is an abundant number, since it is smaller than the sum of its proper divisors (22781647364334).

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

21613357755474 is a wasteful number, since it uses less digits than its factorization.

21613357755474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97357467409.

The product of its digits is 74088000, while the sum is 60.

The spelling of 21613357755474 in words is "twenty-one trillion, six hundred thirteen billion, three hundred fifty-seven million, seven hundred fifty-five thousand, four hundred seventy-four".