21363140740 has 24 divisors (see below), whose sum is σ = 45185353920. Its totient is φ = 8483778528.

The previous prime is 21363140717. The next prime is 21363140779. The reversal of 21363140740 is 4704136312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3839512 + ... + 3845071.

It is an arithmetic number, because the mean of its divisors is an integer number (1882723080).

Almost surely, 2^21363140740 is an apocalyptic number.

21363140740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21363140740 is an abundant number, since it is smaller than the sum of its proper divisors (23822213180).

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

21363140740 is a wasteful number, since it uses less digits than its factorization.

21363140740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7684731 (or 7684729 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The spelling of 21363140740 in words is "twenty-one billion, three hundred sixty-three million, one hundred forty thousand, seven hundred forty".