20132400402 has 24 divisors (see below), whose sum is σ = 43623101340. Its totient is φ = 6710353920.

The previous prime is 20132400349. The next prime is 20132400439. The reversal of 20132400402 is 20400423102.

20132400402 is a `hidden beast` number, since 20 + 1 + 3 + 240 + 0 + 402 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19908927801 + 223472601 = 141099^2 + 14949^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 350002 + ... + 403442.

Almost surely, 2^20132400402 is an apocalyptic number.

20132400402 is an abundant number, since it is smaller than the sum of its proper divisors (23490700938).

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

20132400402 is a wasteful number, since it uses less digits than its factorization.

20132400402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74378 (or 74375 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 20132400402 its reverse (20400423102), we get a palindrome (40532823504).

The spelling of 20132400402 in words is "twenty billion, one hundred thirty-two million, four hundred thousand, four hundred two".