20402232103 has 4 divisors (see below), whose sum is σ = 22256980488. Its totient is φ = 18547483720.

The previous prime is 20402232031. The next prime is 20402232143. The reversal of 20402232103 is 30123220402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20402232103 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 (20402232143) 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, 927374176 + ... + 927374197.

It is an arithmetic number, because the mean of its divisors is an integer number (5564245122).

Almost surely, 2^20402232103 is an apocalyptic number.

20402232103 is a deficient number, since it is larger than the sum of its proper divisors (1854748385).

20402232103 is a wasteful number, since it uses less digits than its factorization.

20402232103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854748384.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 20402232103 its reverse (30123220402), we get a palindrome (50525452505).

The spelling of 20402232103 in words is "twenty billion, four hundred two million, two hundred thirty-two thousand, one hundred three".