21395614704 has 40 divisors (see below), whose sum is σ = 55431333120. Its totient is φ = 7111313088.

The previous prime is 21395614703. The next prime is 21395614729. The reversal of 21395614704 is 40741659312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21395614703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625624 + ... + 658935.

It is an arithmetic number, because the mean of its divisors is an integer number (1385783328).

Almost surely, 2^21395614704 is an apocalyptic number.

21395614704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21395614704 is an abundant number, since it is smaller than the sum of its proper divisors (34035718416).

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

21395614704 is a wasteful number, since it uses less digits than its factorization.

21395614704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284917 (or 1284911 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The spelling of 21395614704 in words is "twenty-one billion, three hundred ninety-five million, six hundred fourteen thousand, seven hundred four".