20501233507 has 2 divisors, whose sum is σ = 20501233508. Its totient is φ = 20501233506.

The previous prime is 20501233469. The next prime is 20501233547. The reversal of 20501233507 is 70533210502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20501233507 - 2³¹ = 18353749859 is a prime.

It is not a weakly prime, because it can be changed into another prime (20501233547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10250616753 + 10250616754.

It is an arithmetic number, because the mean of its divisors is an integer number (10250616754).

Almost surely, 2^20501233507 is an apocalyptic number.

20501233507 is a deficient number, since it is larger than the sum of its proper divisors (1).

20501233507 is an equidigital number, since it uses as much as digits as its factorization.

20501233507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 28.

The spelling of 20501233507 in words is "twenty billion, five hundred one million, two hundred thirty-three thousand, five hundred seven".