20400610005331 has 2 divisors, whose sum is σ = 20400610005332. Its totient is φ = 20400610005330.

The previous prime is 20400610005317. The next prime is 20400610005337. The reversal of 20400610005331 is 13350001600402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20400610005331 - 2¹³ = 20400609997139 is a prime.

It is a super-2 number, since 2×20400610005331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20400610005296 and 20400610005305.

It is not a weakly prime, because it can be changed into another prime (20400610005337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200305002665 + 10200305002666.

It is an arithmetic number, because the mean of its divisors is an integer number (10200305002666).

Almost surely, 2^{20400610005331} is an apocalyptic number.

20400610005331 is a deficient number, since it is larger than the sum of its proper divisors (1).

20400610005331 is an equidigital number, since it uses as much as digits as its factorization.

20400610005331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 20400610005331 its reverse (13350001600402), we get a palindrome (33750611605733).

The spelling of 20400610005331 in words is "twenty trillion, four hundred billion, six hundred ten million, five thousand, three hundred thirty-one".