20457520508 has 24 divisors (see below), whose sum is σ = 36220431744. Its totient is φ = 10109192000.

The previous prime is 20457520507. The next prime is 20457520519. The reversal of 20457520508 is 80502575402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20457520507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179573 + ... + 270483.

It is an arithmetic number, because the mean of its divisors is an integer number (1509184656).

Almost surely, 2^20457520508 is an apocalyptic number.

It is an amenable number.

20457520508 is a deficient number, since it is larger than the sum of its proper divisors (15762911236).

20457520508 is a wasteful number, since it uses less digits than its factorization.

20457520508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91573 (or 91571 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 38.

The spelling of 20457520508 in words is "twenty billion, four hundred fifty-seven million, five hundred twenty thousand, five hundred eight".