20257770752742 has 32 divisors (see below), whose sum is σ = 40898743368192. Its totient is φ = 6688737323424.

The previous prime is 20257770752731. The next prime is 20257770752759. The reversal of 20257770752742 is 24725707775202.

It is a congruent number.

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, 4030848 + ... + 7534140.

It is an arithmetic number, because the mean of its divisors is an integer number (1278085730256).

Almost surely, 2^{20257770752742} is an apocalyptic number.

20257770752742 is an abundant number, since it is smaller than the sum of its proper divisors (20640972615450).

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

20257770752742 is a wasteful number, since it uses less digits than its factorization.

20257770752742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512412.

The product of its (nonzero) digits is 26891200, while the sum is 57.

The spelling of 20257770752742 in words is "twenty trillion, two hundred fifty-seven billion, seven hundred seventy million, seven hundred fifty-two thousand, seven hundred forty-two".