21323032100 has 36 divisors (see below), whose sum is σ = 46333753200. Its totient is φ = 8517641760.

The previous prime is 21323032091. The next prime is 21323032111. The reversal of 21323032100 is 123032312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70370 + ... + 218169.

It is an arithmetic number, because the mean of its divisors is an integer number (1287048700).

Almost surely, 2^21323032100 is an apocalyptic number.

21323032100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323032100 is an abundant number, since it is smaller than the sum of its proper divisors (25010721100).

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

21323032100 is a wasteful number, since it uses less digits than its factorization.

21323032100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289292 (or 289285 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21323032100 its reverse (123032312), we get a palindrome (21446064412).

The spelling of 21323032100 in words is "twenty-one billion, three hundred twenty-three million, thirty-two thousand, one hundred".