21546104604 has 24 divisors (see below), whose sum is σ = 50334911760. Its totient is φ = 7173368064.

The previous prime is 21546104551. The next prime is 21546104639. The reversal of 21546104604 is 40640164512.

It is a congruent number.

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, 1072989 + ... + 1092884.

It is an arithmetic number, because the mean of its divisors is an integer number (2097287990).

Almost surely, 2^21546104604 is an apocalyptic number.

It is an amenable number.

21546104604 is an abundant number, since it is smaller than the sum of its proper divisors (28788807156).

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

21546104604 is a wasteful number, since it uses less digits than its factorization.

21546104604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166709 (or 2166707 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 21546104604 in words is "twenty-one billion, five hundred forty-six million, one hundred four thousand, six hundred four".