20457759567 has 16 divisors (see below), whose sum is σ = 31419195392. Its totient is φ = 11598098400.

The previous prime is 20457759551. The next prime is 20457759571. The reversal of 20457759567 is 76595775402.

It is not a de Polignac number, because 20457759567 - 2⁴ = 20457759551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20457759547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3832684 + ... + 3838017.

It is an arithmetic number, because the mean of its divisors is an integer number (1963699712).

Almost surely, 2^20457759567 is an apocalyptic number.

20457759567 is a deficient number, since it is larger than the sum of its proper divisors (10961435825).

20457759567 is a wasteful number, since it uses less digits than its factorization.

20457759567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7670838.

The product of its (nonzero) digits is 18522000, while the sum is 57.

The spelling of 20457759567 in words is "twenty billion, four hundred fifty-seven million, seven hundred fifty-nine thousand, five hundred sixty-seven".