20454431205013 has 16 divisors (see below), whose sum is σ = 23369973935616. Its totient is φ = 17735036716800.

The previous prime is 20454431204983. The next prime is 20454431205041. The reversal of 20454431205013 is 31050213445402.

It is not a de Polignac number, because 20454431205013 - 2³⁷ = 20316992251541 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 20454431205013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454431205413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91890813 + ... + 92113138.

It is an arithmetic number, because the mean of its divisors is an integer number (1460623370976).

Almost surely, 2^{20454431205013} is an apocalyptic number.

It is an amenable number.

20454431205013 is a deficient number, since it is larger than the sum of its proper divisors (2915542730603).

20454431205013 is a wasteful number, since it uses less digits than its factorization.

20454431205013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184004484.

The product of its (nonzero) digits is 57600, while the sum is 34.

The spelling of 20454431205013 in words is "twenty trillion, four hundred fifty-four billion, four hundred thirty-one million, two hundred five thousand, thirteen".