20808480031 has 2 divisors, whose sum is σ = 20808480032. Its totient is φ = 20808480030.

The previous prime is 20808480013. The next prime is 20808480041. The reversal of 20808480031 is 13008480802.

Together with previous prime (20808480013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20808480031 - 2²⁹ = 20271609119 is a prime.

It is a super-2 number, since 2×20808480031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20808480001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10404240015 + 10404240016.

It is an arithmetic number, because the mean of its divisors is an integer number (10404240016).

Almost surely, 2^20808480031 is an apocalyptic number.

20808480031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20808480031 is an equidigital number, since it uses as much as digits as its factorization.

20808480031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 34.

The spelling of 20808480031 in words is "twenty billion, eight hundred eight million, four hundred eighty thousand, thirty-one".