20524540979 has 2 divisors, whose sum is σ = 20524540980. Its totient is φ = 20524540978.

The previous prime is 20524540973. The next prime is 20524541033. The reversal of 20524540979 is 97904542502.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20524540979 - 2⁸ = 20524540723 is a prime.

It is not a weakly prime, because it can be changed into another prime (20524540973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10262270489 + 10262270490.

It is an arithmetic number, because the mean of its divisors is an integer number (10262270490).

Almost surely, 2^20524540979 is an apocalyptic number.

20524540979 is a deficient number, since it is larger than the sum of its proper divisors (1).

20524540979 is an equidigital number, since it uses as much as digits as its factorization.

20524540979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 20524540979 in words is "twenty billion, five hundred twenty-four million, five hundred forty thousand, nine hundred seventy-nine".