20670945407378 has 54 divisors (see below), whose sum is σ = 36674544846303. Its totient is φ = 8712590120640.

The previous prime is 20670945407369. The next prime is 20670945407393. The reversal of 20670945407378 is 87370454907602.

It can be written as a sum of positive squares in 5 ways, for example, as 1492508689 + 20669452898689 = 38633^2 + 4546367^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3214883.

It is a self number, because there is not a number n which added to its sum of digits gives 20670945407378.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2745506318 + ... + 2745513846.

Almost surely, 2^{20670945407378} is an apocalyptic number.

20670945407378 is a deficient number, since it is larger than the sum of its proper divisors (16003599438925).

20670945407378 is an frugal number, since it uses more digits than its factorization.

20670945407378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15196 (or 7599 counting only the distinct ones).

The product of its (nonzero) digits is 71124480, while the sum is 62.

The spelling of 20670945407378 in words is "twenty trillion, six hundred seventy billion, nine hundred forty-five million, four hundred seven thousand, three hundred seventy-eight".