20432865407 has 2 divisors, whose sum is σ = 20432865408. Its totient is φ = 20432865406.

The previous prime is 20432865367. The next prime is 20432865433. The reversal of 20432865407 is 70456823402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20432865407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20432862407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216432703 + 10216432704.

It is an arithmetic number, because the mean of its divisors is an integer number (10216432704).

Almost surely, 2^20432865407 is an apocalyptic number.

20432865407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432865407 is an equidigital number, since it uses as much as digits as its factorization.

20432865407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 20432865407 in words is "twenty billion, four hundred thirty-two million, eight hundred sixty-five thousand, four hundred seven".