20158778713452 has 48 divisors (see below), whose sum is σ = 49834766614752. Its totient is φ = 6320421135360.

The previous prime is 20158778713433. The next prime is 20158778713531. The reversal of 20158778713452 is 25431787785102.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30149743 + ... + 30811110.

It is an arithmetic number, because the mean of its divisors is an integer number (1038224304474).

Almost surely, 2^{20158778713452} is an apocalyptic number.

It is an amenable number.

20158778713452 is an abundant number, since it is smaller than the sum of its proper divisors (29675987901300).

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

20158778713452 is a wasteful number, since it uses less digits than its factorization.

20158778713452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60962498 (or 60962496 counting only the distinct ones).

The product of its (nonzero) digits is 26342400, while the sum is 60.

The spelling of 20158778713452 in words is "twenty trillion, one hundred fifty-eight billion, seven hundred seventy-eight million, seven hundred thirteen thousand, four hundred fifty-two".