20402021103 has 16 divisors (see below), whose sum is σ = 28259076096. Its totient is φ = 13078746720.

The previous prime is 20402021099. The next prime is 20402021117. The reversal of 20402021103 is 30112020402.

It is not a de Polignac number, because 20402021103 - 2² = 20402021099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402021183) 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, 684051 + ... + 713252.

It is an arithmetic number, because the mean of its divisors is an integer number (1766192256).

Almost surely, 2^20402021103 is an apocalyptic number.

20402021103 is a deficient number, since it is larger than the sum of its proper divisors (7857054993).

20402021103 is a wasteful number, since it uses less digits than its factorization.

20402021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397494.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 20402021103 its reverse (30112020402), we get a palindrome (50514041505).

The spelling of 20402021103 in words is "twenty billion, four hundred two million, twenty-one thousand, one hundred three".