20620512431 has 2 divisors, whose sum is σ = 20620512432. Its totient is φ = 20620512430.

The previous prime is 20620512427. The next prime is 20620512433. The reversal of 20620512431 is 13421502602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20620512431 - 2² = 20620512427 is a prime.

It is a super-2 number, since 2×20620512431² (a number of 21 digits) contains 22 as substring.

Together with 20620512433, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20620512431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20620512433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10310256215 + 10310256216.

It is an arithmetic number, because the mean of its divisors is an integer number (10310256216).

Almost surely, 2^20620512431 is an apocalyptic number.

20620512431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20620512431 is an equidigital number, since it uses as much as digits as its factorization.

20620512431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The spelling of 20620512431 in words is "twenty billion, six hundred twenty million, five hundred twelve thousand, four hundred thirty-one".