20401024331 has 2 divisors, whose sum is σ = 20401024332. Its totient is φ = 20401024330.

The previous prime is 20401024321. The next prime is 20401024333. The reversal of 20401024331 is 13342010402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20401024331 is a prime.

It is a super-2 number, since 2×20401024331² (a number of 21 digits) contains 22 as substring.

Together with 20401024333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20401024333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200512165 + 10200512166.

It is an arithmetic number, because the mean of its divisors is an integer number (10200512166).

Almost surely, 2^20401024331 is an apocalyptic number.

20401024331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401024331 is an equidigital number, since it uses as much as digits as its factorization.

20401024331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20401024331 its reverse (13342010402), we get a palindrome (33743034733).

The spelling of 20401024331 in words is "twenty billion, four hundred one million, twenty-four thousand, three hundred thirty-one".