20402003200 has 54 divisors (see below), whose sum is σ = 50498161574. Its totient is φ = 8160798720.

The previous prime is 20402003177. The next prime is 20402003227. The reversal of 20402003200 is 230020402.

It can be written as a sum of positive squares in 3 ways, for example, as 405780736 + 19996222464 = 20144^2 + 141408^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1587507 + ... + 1600306.

Almost surely, 2^20402003200 is an apocalyptic number.

20402003200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402003200 is an abundant number, since it is smaller than the sum of its proper divisors (30096158374).

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

20402003200 is an equidigital number, since it uses as much as digits as its factorization.

20402003200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187839 (or 3187820 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 13.

Adding to 20402003200 its reverse (230020402), we get a palindrome (20632023602).

It can be divided in two parts, 2040200 and 3200, that multiplied together give a square (6528640000 = 80800²).

The spelling of 20402003200 in words is "twenty billion, four hundred two million, three thousand, two hundred".