21487354674 has 16 divisors (see below), whose sum is σ = 43049978400. Its totient is φ = 7149906720.

The previous prime is 21487354633. The next prime is 21487354687. The reversal of 21487354674 is 47645378412.

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, 3132499 + ... + 3139350.

It is an arithmetic number, because the mean of its divisors is an integer number (2690623650).

Almost surely, 2^21487354674 is an apocalyptic number.

21487354674 is an abundant number, since it is smaller than the sum of its proper divisors (21562623726).

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

21487354674 is a wasteful number, since it uses less digits than its factorization.

21487354674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6272425.

The product of its digits is 4515840, while the sum is 51.

The spelling of 21487354674 in words is "twenty-one billion, four hundred eighty-seven million, three hundred fifty-four thousand, six hundred seventy-four".