20302431253403 has 32 divisors (see below), whose sum is σ = 23593109568000. Its totient is φ = 17308926547200.

The previous prime is 20302431253331. The next prime is 20302431253453. The reversal of 20302431253403 is 30435213420302.

It is a cyclic number.

It is not a de Polignac number, because 20302431253403 - 2³² = 20298136286107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20302431253403.

It is not an unprimeable number, because it can be changed into a prime (20302431253453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13451168 + ... + 14884178.

It is an arithmetic number, because the mean of its divisors is an integer number (737284674000).

Almost surely, 2^{20302431253403} is an apocalyptic number.

20302431253403 is a deficient number, since it is larger than the sum of its proper divisors (3290678314597).

20302431253403 is a wasteful number, since it uses less digits than its factorization.

20302431253403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434483.

The product of its (nonzero) digits is 51840, while the sum is 32.

Adding to 20302431253403 its reverse (30435213420302), we get a palindrome (50737644673705).

The spelling of 20302431253403 in words is "twenty trillion, three hundred two billion, four hundred thirty-one million, two hundred fifty-three thousand, four hundred three".