20400203101 has 16 divisors (see below), whose sum is σ = 21009369600. Its totient is φ = 19801611648.

The previous prime is 20400203093. The next prime is 20400203113. The reversal of 20400203101 is 10130200402.

It is not a de Polignac number, because 20400203101 - 2³ = 20400203093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20400203141) 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, 1822560 + ... + 1833718.

It is an arithmetic number, because the mean of its divisors is an integer number (1313085600).

Almost surely, 2^20400203101 is an apocalyptic number.

It is an amenable number.

20400203101 is a deficient number, since it is larger than the sum of its proper divisors (609166499).

20400203101 is a wasteful number, since it uses less digits than its factorization.

20400203101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11628.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 20400203101 its reverse (10130200402), we get a palindrome (30530403503).

The spelling of 20400203101 in words is "twenty billion, four hundred million, two hundred three thousand, one hundred one".