21485849504 has 24 divisors (see below), whose sum is σ = 48343161888. Its totient is φ = 9208221120.

The previous prime is 21485849461. The next prime is 21485849537. The reversal of 21485849504 is 40594858412.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47959262 + ... + 47959709.

It is an arithmetic number, because the mean of its divisors is an integer number (2014298412).

Almost surely, 2^21485849504 is an apocalyptic number.

It is an amenable number.

21485849504 is an abundant number, since it is smaller than the sum of its proper divisors (26857312384).

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

21485849504 is an equidigital number, since it uses as much as digits as its factorization.

21485849504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95918988 (or 95918980 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 50.

The spelling of 21485849504 in words is "twenty-one billion, four hundred eighty-five million, eight hundred forty-nine thousand, five hundred four".