21246630244 has 24 divisors (see below), whose sum is σ = 42571836608. Its totient is φ = 9088860960.

The previous prime is 21246630203. The next prime is 21246630289. The reversal of 21246630244 is 44203664212.

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, 686154 + ... + 716449.

Almost surely, 2^21246630244 is an apocalyptic number.

It is an amenable number.

21246630244 is an abundant number, since it is smaller than the sum of its proper divisors (21325206364).

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

21246630244 is a wasteful number, since it uses less digits than its factorization.

21246630244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403155 (or 1403153 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 21246630244 in words is "twenty-one billion, two hundred forty-six million, six hundred thirty thousand, two hundred forty-four".