21313478814 has 32 divisors (see below), whose sum is σ = 43805608704. Its totient is φ = 6909470400.

The previous prime is 21313478803. The next prime is 21313478819. The reversal of 21313478814 is 41887431312.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21313478819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117162 + ... + 237389.

It is an arithmetic number, because the mean of its divisors is an integer number (1368925272).

Almost surely, 2^21313478814 is an apocalyptic number.

21313478814 is an abundant number, since it is smaller than the sum of its proper divisors (22492129890).

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

21313478814 is a wasteful number, since it uses less digits than its factorization.

21313478814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354832.

The product of its digits is 129024, while the sum is 42.

The spelling of 21313478814 in words is "twenty-one billion, three hundred thirteen million, four hundred seventy-eight thousand, eight hundred fourteen".