21423424615748 has 12 divisors (see below), whose sum is σ = 37912240191420. Its totient is φ = 10591355989632.

The previous prime is 21423424615661. The next prime is 21423424615771. The reversal of 21423424615748 is 84751642432412.

It can be written as a sum of positive squares in 2 ways, for example, as 4969546645504 + 16453877970244 = 2229248^2 + 4056338^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21423424615748.

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, 30089079161 + ... + 30089079872.

It is an arithmetic number, because the mean of its divisors is an integer number (3159353349285).

Almost surely, 2^{21423424615748} is an apocalyptic number.

It is an amenable number.

21423424615748 is a deficient number, since it is larger than the sum of its proper divisors (16488815575672).

21423424615748 is a wasteful number, since it uses less digits than its factorization.

21423424615748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60178159126 (or 60178159124 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 53.

The spelling of 21423424615748 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-four million, six hundred fifteen thousand, seven hundred forty-eight".