20316495278 has 4 divisors (see below), whose sum is σ = 30474742920. Its totient is φ = 10158247638.

The previous prime is 20316495253. The next prime is 20316495289. The reversal of 20316495278 is 87259461302.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5079123818 + ... + 5079123821.

It is an arithmetic number, because the mean of its divisors is an integer number (7618685730).

It is a 1-persistent number, because it is pandigital, but 2⋅20316495278 = 40632990556 is not.

Almost surely, 2^20316495278 is an apocalyptic number.

20316495278 is a deficient number, since it is larger than the sum of its proper divisors (10158247642).

20316495278 is a wasteful number, since it uses less digits than its factorization.

20316495278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10158247641.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 20316495278 in words is "twenty billion, three hundred sixteen million, four hundred ninety-five thousand, two hundred seventy-eight".