20378766878788 has 24 divisors (see below), whose sum is σ = 37214915851008. Its totient is φ = 9745969861056.

The previous prime is 20378766878777. The next prime is 20378766878809. The reversal of 20378766878788 is 88787866787302.

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, 2232681 + ... + 6763312.

It is an arithmetic number, because the mean of its divisors is an integer number (1550621493792).

Almost surely, 2^{20378766878788} is an apocalyptic number.

It is an amenable number.

20378766878788 is a deficient number, since it is larger than the sum of its proper divisors (16836148972220).

20378766878788 is a wasteful number, since it uses less digits than its factorization.

20378766878788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9020643 (or 9020641 counting only the distinct ones).

The product of its (nonzero) digits is 16994009088, while the sum is 85.

The spelling of 20378766878788 in words is "twenty trillion, three hundred seventy-eight billion, seven hundred sixty-six million, eight hundred seventy-eight thousand, seven hundred eighty-eight".