20405250554426 has 16 divisors (see below), whose sum is σ = 31561110441504. Its totient is φ = 9889519018704.

The previous prime is 20405250554419. The next prime is 20405250554459. The reversal of 20405250554426 is 62445505250402.

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, 1159643996 + ... + 1159661591.

It is an arithmetic number, because the mean of its divisors is an integer number (1972569402594).

Almost surely, 2^{20405250554426} is an apocalyptic number.

20405250554426 is a deficient number, since it is larger than the sum of its proper divisors (11155859887078).

20405250554426 is a wasteful number, since it uses less digits than its factorization.

20405250554426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319305725.

The product of its (nonzero) digits is 1920000, while the sum is 44.

The spelling of 20405250554426 in words is "twenty trillion, four hundred five billion, two hundred fifty million, five hundred fifty-four thousand, four hundred twenty-six".