21421244604 has 48 divisors (see below), whose sum is σ = 53134050816. Its totient is φ = 6693600000.

The previous prime is 21421244599. The next prime is 21421244617. The reversal of 21421244604 is 40644212412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157972 + ... + 260379.

It is an arithmetic number, because the mean of its divisors is an integer number (1106959392).

Almost surely, 2^21421244604 is an apocalyptic number.

It is an amenable number.

21421244604 is an abundant number, since it is smaller than the sum of its proper divisors (31712806212).

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

21421244604 is a wasteful number, since it uses less digits than its factorization.

21421244604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418626 (or 418624 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The spelling of 21421244604 in words is "twenty-one billion, four hundred twenty-one million, two hundred forty-four thousand, six hundred four".