20457520507 has 2 divisors, whose sum is σ = 20457520508. Its totient is φ = 20457520506.

The previous prime is 20457520451. The next prime is 20457520519. The reversal of 20457520507 is 70502575402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20457520507 - 2⁷ = 20457520379 is a prime.

It is not a weakly prime, because it can be changed into another prime (20457520007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10228760253 + 10228760254.

It is an arithmetic number, because the mean of its divisors is an integer number (10228760254).

Almost surely, 2^20457520507 is an apocalyptic number.

20457520507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20457520507 is an equidigital number, since it uses as much as digits as its factorization.

20457520507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98000, while the sum is 37.

The spelling of 20457520507 in words is "twenty billion, four hundred fifty-seven million, five hundred twenty thousand, five hundred seven".