21454368074558 has 24 divisors (see below), whose sum is σ = 34471395956232. Its totient is φ = 10010914852752.

The previous prime is 21454368074483. The next prime is 21454368074609. The reversal of 21454368074558 is 85547086345412.

It is a super-2 number, since 2×21454368074558² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21454368074558.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221706785 + ... + 221803532.

It is an arithmetic number, because the mean of its divisors is an integer number (1436308164843).

Almost surely, 2^{21454368074558} is an apocalyptic number.

21454368074558 is a deficient number, since it is larger than the sum of its proper divisors (13017027881674).

21454368074558 is a wasteful number, since it uses less digits than its factorization.

21454368074558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443510424 (or 443510405 counting only the distinct ones).

The product of its (nonzero) digits is 129024000, while the sum is 62.

The spelling of 21454368074558 in words is "twenty-one trillion, four hundred fifty-four billion, three hundred sixty-eight million, seventy-four thousand, five hundred fifty-eight".