20147316878 has 16 divisors (see below), whose sum is σ = 32579018640. Its totient is φ = 9289232256.

The previous prime is 20147316841. The next prime is 20147316901. The reversal of 20147316878 is 87861374102.

It is a happy number.

It is a congruent number.

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, 371168 + ... + 421971.

It is an arithmetic number, because the mean of its divisors is an integer number (2036188665).

Almost surely, 2^20147316878 is an apocalyptic number.

20147316878 is a deficient number, since it is larger than the sum of its proper divisors (12431701762).

20147316878 is a wasteful number, since it uses less digits than its factorization.

20147316878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794131.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 20147316878 in words is "twenty billion, one hundred forty-seven million, three hundred sixteen thousand, eight hundred seventy-eight".