20423202400 has 36 divisors (see below), whose sum is σ = 49858144812. Its totient is φ = 8169280640.

The previous prime is 20423202379. The next prime is 20423202403. The reversal of 20423202400 is 420232402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20423202403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12763702 + ... + 12765301.

It is an arithmetic number, because the mean of its divisors is an integer number (1384948467).

Almost surely, 2^20423202400 is an apocalyptic number.

20423202400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423202400 is an abundant number, since it is smaller than the sum of its proper divisors (29434942412).

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

20423202400 is a wasteful number, since it uses less digits than its factorization.

20423202400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25529023 (or 25529010 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

Adding to 20423202400 its reverse (420232402), we get a palindrome (20843434802).

The spelling of 20423202400 in words is "twenty billion, four hundred twenty-three million, two hundred two thousand, four hundred".