20402311110 has 16 divisors (see below), whose sum is σ = 48965546736. Its totient is φ = 5440616288.

The previous prime is 20402311103. The next prime is 20402311117. The reversal of 20402311110 is 1111320402.

It is an interprime number because it is at equal distance from previous prime (20402311103) and next prime (20402311117).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20402311110.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402311117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340038489 + ... + 340038548.

It is an arithmetic number, because the mean of its divisors is an integer number (3060346671).

Almost surely, 2^20402311110 is an apocalyptic number.

20402311110 is an abundant number, since it is smaller than the sum of its proper divisors (28563235626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20402311110 is a wasteful number, since it uses less digits than its factorization.

20402311110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680077047.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20402311110 its reverse (1111320402), we get a palindrome (21513631512).

The spelling of 20402311110 in words is "twenty billion, four hundred two million, three hundred eleven thousand, one hundred ten".