21621412157674 has 64 divisors (see below), whose sum is σ = 37763255496960. Its totient is φ = 9092573844480.

The previous prime is 21621412157663. The next prime is 21621412157743. The reversal of 21621412157674 is 47675121412612.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 845267017 + ... + 845292595.

It is an arithmetic number, because the mean of its divisors is an integer number (590050867140).

Almost surely, 2^{21621412157674} is an apocalyptic number.

21621412157674 is a deficient number, since it is larger than the sum of its proper divisors (16141843339286).

21621412157674 is a wasteful number, since it uses less digits than its factorization.

21621412157674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27983.

The product of its digits is 1128960, while the sum is 49.

The spelling of 21621412157674 in words is "twenty-one trillion, six hundred twenty-one billion, four hundred twelve million, one hundred fifty-seven thousand, six hundred seventy-four".