21154535620562 has 16 divisors (see below), whose sum is σ = 31899549382272. Its totient is φ = 10521374954160.

The previous prime is 21154535620481. The next prime is 21154535620597. The reversal of 21154535620562 is 26502653545112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3728264 + ... + 7497267.

It is an arithmetic number, because the mean of its divisors is an integer number (1993721836392).

Almost surely, 2^{21154535620562} is an apocalyptic number.

21154535620562 is a deficient number, since it is larger than the sum of its proper divisors (10745013761710).

21154535620562 is a wasteful number, since it uses less digits than its factorization.

21154535620562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11230513.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 21154535620562 in words is "twenty-one trillion, one hundred fifty-four billion, five hundred thirty-five million, six hundred twenty thousand, five hundred sixty-two".