21431132300 has 36 divisors (see below), whose sum is σ = 46515486360. Its totient is φ = 8570622720.

The previous prime is 21431132293. The next prime is 21431132309. The reversal of 21431132300 is 323113412.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (21431132309) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 509471 + ... + 549929.

Almost surely, 2^21431132300 is an apocalyptic number.

21431132300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21431132300 is an abundant number, since it is smaller than the sum of its proper divisors (25084354060).

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

21431132300 is a wasteful number, since it uses less digits than its factorization.

21431132300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45770 (or 45763 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21431132300 its reverse (323113412), we get a palindrome (21754245712).

The spelling of 21431132300 in words is "twenty-one billion, four hundred thirty-one million, one hundred thirty-two thousand, three hundred".