21046624284 has 48 divisors (see below), whose sum is σ = 57934800896. Its totient is φ = 5819342400.

The previous prime is 21046624279. The next prime is 21046624309. The reversal of 21046624284 is 48242664012.

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, 4038607 + ... + 4043814.

Almost surely, 2^21046624284 is an apocalyptic number.

It is an amenable number.

21046624284 is an abundant number, since it is smaller than the sum of its proper divisors (36888176612).

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

21046624284 is a wasteful number, since it uses less digits than its factorization.

21046624284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8082466 (or 8082464 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 39.

The spelling of 21046624284 in words is "twenty-one billion, forty-six million, six hundred twenty-four thousand, two hundred eighty-four".