20402312200 has 24 divisors (see below), whose sum is σ = 47435376330. Its totient is φ = 8160924800.

The previous prime is 20402312167. The next prime is 20402312237. The reversal of 20402312200 is 221320402.

It can be written as a sum of positive squares in 3 ways, for example, as 16513792036 + 3888520164 = 128506^2 + 62358^2 .

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, 51005581 + ... + 51005980.

Almost surely, 2^20402312200 is an apocalyptic number.

20402312200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402312200 is an abundant number, since it is smaller than the sum of its proper divisors (27033064130).

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

20402312200 is a wasteful number, since it uses less digits than its factorization.

20402312200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102011577 (or 102011568 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 20402312200 its reverse (221320402), we get a palindrome (20623632602).

The spelling of 20402312200 in words is "twenty billion, four hundred two million, three hundred twelve thousand, two hundred".