21889415100 has 144 divisors (see below), whose sum is σ = 75528165888. Its totient is φ = 4785749760.

The previous prime is 21889415099. The next prime is 21889415113. The reversal of 21889415100 is 151498812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 178299 + ... + 274898.

It is an arithmetic number, because the mean of its divisors is an integer number (524501152).

Almost surely, 2^21889415100 is an apocalyptic number.

21889415100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21889415100 is an abundant number, since it is smaller than the sum of its proper divisors (53638750788).

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

21889415100 is a wasteful number, since it uses less digits than its factorization.

21889415100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453244 (or 453237 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 39.

The spelling of 21889415100 in words is "twenty-one billion, eight hundred eighty-nine million, four hundred fifteen thousand, one hundred".