10402040402431 has 4 divisors (see below), whose sum is σ = 10737590092864. Its totient is φ = 10066490712000.

The previous prime is 10402040402419. The next prime is 10402040402443. The reversal of 10402040402431 is 13420404020401.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (10402040402419) and next prime (10402040402443).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10402040402431 is a prime.

It is a super-2 number, since 2×10402040402431² (a number of 27 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 = 10402040402396 and 10402040402405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10402040406431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167774845170 + ... + 167774845231.

It is an arithmetic number, because the mean of its divisors is an integer number (2684397523216).

Almost surely, 2^{10402040402431} is an apocalyptic number.

10402040402431 is a deficient number, since it is larger than the sum of its proper divisors (335549690433).

10402040402431 is an equidigital number, since it uses as much as digits as its factorization.

10402040402431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335549690432.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 10402040402431 its reverse (13420404020401), we get a palindrome (23822444422832).

The spelling of 10402040402431 in words is "ten trillion, four hundred two billion, forty million, four hundred two thousand, four hundred thirty-one".