20456531365403 has 24 divisors (see below), whose sum is σ = 24078456511200. Its totient is φ = 17326559741568.

The previous prime is 20456531365379. The next prime is 20456531365451. The reversal of 20456531365403 is 30456313565402.

It is not a de Polignac number, because 20456531365403 - 2²² = 20456527171099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20456531365493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5706218 + ... + 8571696.

It is an arithmetic number, because the mean of its divisors is an integer number (1003269021300).

Almost surely, 2^{20456531365403} is an apocalyptic number.

20456531365403 is a deficient number, since it is larger than the sum of its proper divisors (3621925145797).

20456531365403 is a wasteful number, since it uses less digits than its factorization.

20456531365403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867219 (or 2867212 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 47.

The spelling of 20456531365403 in words is "twenty trillion, four hundred fifty-six billion, five hundred thirty-one million, three hundred sixty-five thousand, four hundred three".