21901049576 has 32 divisors (see below), whose sum is σ = 46936169280. Its totient is φ = 9385094400.

The previous prime is 21901049557. The next prime is 21901049609. The reversal of 21901049576 is 67594010912.

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, 656336 + ... + 688896.

It is an arithmetic number, because the mean of its divisors is an integer number (1466755290).

Almost surely, 2^21901049576 is an apocalyptic number.

It is an amenable number.

21901049576 is an abundant number, since it is smaller than the sum of its proper divisors (25035119704).

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

21901049576 is a wasteful number, since it uses less digits than its factorization.

21901049576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44585 (or 44581 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 21901049576 in words is "twenty-one billion, nine hundred one million, forty-nine thousand, five hundred seventy-six".