20812375878 has 32 divisors (see below), whose sum is σ = 47575758336. Its totient is φ = 5945816448.

The previous prime is 20812375849. The next prime is 20812375879. The reversal of 20812375878 is 87857321802.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20812375878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20812375879) 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, 612750 + ... + 645822.

It is an arithmetic number, because the mean of its divisors is an integer number (1486742448).

Almost surely, 2^20812375878 is an apocalyptic number.

20812375878 is an abundant number, since it is smaller than the sum of its proper divisors (26763382458).

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

20812375878 is a wasteful number, since it uses less digits than its factorization.

20812375878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48068.

The product of its (nonzero) digits is 1505280, while the sum is 51.

The spelling of 20812375878 in words is "twenty billion, eight hundred twelve million, three hundred seventy-five thousand, eight hundred seventy-eight".