20110323402 has 48 divisors (see below), whose sum is σ = 47072287080. Its totient is φ = 6168249216.

The previous prime is 20110323307. The next prime is 20110323407. The reversal of 20110323402 is 20432301102.

It can be written as a sum of positive squares in 4 ways, for example, as 4229030961 + 15881292441 = 65031^2 + 126021^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20110323407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61377 + ... + 209732.

Almost surely, 2^20110323402 is an apocalyptic number.

20110323402 is an abundant number, since it is smaller than the sum of its proper divisors (26961963678).

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

20110323402 is a wasteful number, since it uses less digits than its factorization.

20110323402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271447 (or 271444 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 20110323402 its reverse (20432301102), we get a palindrome (40542624504).

The spelling of 20110323402 in words is "twenty billion, one hundred ten million, three hundred twenty-three thousand, four hundred two".