20078802931 has 8 divisors (see below), whose sum is σ = 22370194944. Its totient is φ = 17865085320.

The previous prime is 20078802923. The next prime is 20078802943. The reversal of 20078802931 is 13920887002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20078802931 - 2³ = 20078802923 is a prime.

It is a super-2 number, since 2×20078802931² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20078802971) 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, 19418055 + ... + 19419088.

It is an arithmetic number, because the mean of its divisors is an integer number (2796274368).

Almost surely, 2^20078802931 is an apocalyptic number.

20078802931 is a deficient number, since it is larger than the sum of its proper divisors (2291392013).

20078802931 is a wasteful number, since it uses less digits than its factorization.

20078802931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38837201.

The product of its (nonzero) digits is 48384, while the sum is 40.

The spelling of 20078802931 in words is "twenty billion, seventy-eight million, eight hundred two thousand, nine hundred thirty-one".