20458885231 has 2 divisors, whose sum is σ = 20458885232. Its totient is φ = 20458885230.

The previous prime is 20458885217. The next prime is 20458885261. The reversal of 20458885231 is 13258885402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20458885231 - 2⁷ = 20458885103 is a prime.

It is a super-2 number, since 2×20458885231² (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 (20458885211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10229442615 + 10229442616.

It is an arithmetic number, because the mean of its divisors is an integer number (10229442616).

Almost surely, 2^20458885231 is an apocalyptic number.

20458885231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20458885231 is an equidigital number, since it uses as much as digits as its factorization.

20458885231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 20458885231 in words is "twenty billion, four hundred fifty-eight million, eight hundred eighty-five thousand, two hundred thirty-one".