20401010831 has 2 divisors, whose sum is σ = 20401010832. Its totient is φ = 20401010830.

The previous prime is 20401010821. The next prime is 20401010881. The reversal of 20401010831 is 13801010402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20401010831 - 2¹⁴ = 20400994447 is a prime.

It is a super-2 number, since 2×20401010831² (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 (20401010801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200505415 + 10200505416.

It is an arithmetic number, because the mean of its divisors is an integer number (10200505416).

Almost surely, 2^20401010831 is an apocalyptic number.

20401010831 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401010831 is an equidigital number, since it uses as much as digits as its factorization.

20401010831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

The spelling of 20401010831 in words is "twenty billion, four hundred one million, ten thousand, eight hundred thirty-one".