20710591031 has 16 divisors (see below), whose sum is σ = 22789939200. Its totient is φ = 18701121888.

The previous prime is 20710591007. The next prime is 20710591039. The reversal of 20710591031 is 13019501702.

It is a cyclic number.

It is not a de Polignac number, because 20710591031 - 2¹⁸ = 20710328887 is a prime.

It is a super-2 number, since 2×20710591031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20710590985 and 20710591003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20710591039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1360460 + ... + 1375598.

It is an arithmetic number, because the mean of its divisors is an integer number (1424371200).

Almost surely, 2^20710591031 is an apocalyptic number.

20710591031 is a deficient number, since it is larger than the sum of its proper divisors (2079348169).

20710591031 is a wasteful number, since it uses less digits than its factorization.

20710591031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17438.

The product of its (nonzero) digits is 1890, while the sum is 29.

The spelling of 20710591031 in words is "twenty billion, seven hundred ten million, five hundred ninety-one thousand, thirty-one".