20245406039 has 2 divisors, whose sum is σ = 20245406040. Its totient is φ = 20245406038.

The previous prime is 20245405997. The next prime is 20245406099. The reversal of 20245406039 is 93060454202.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20245406039 is a prime.

It is a super-3 number, since 3×20245406039³ (a number of 32 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20245406099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10122703019 + 10122703020.

It is an arithmetic number, because the mean of its divisors is an integer number (10122703020).

Almost surely, 2^20245406039 is an apocalyptic number.

20245406039 is a deficient number, since it is larger than the sum of its proper divisors (1).

20245406039 is an equidigital number, since it uses as much as digits as its factorization.

20245406039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 35.

The spelling of 20245406039 in words is "twenty billion, two hundred forty-five million, four hundred six thousand, thirty-nine".