21382225400 has 48 divisors (see below), whose sum is σ = 50556306600. Its totient is φ = 8407921280.

The previous prime is 21382225309. The next prime is 21382225421. The reversal of 21382225400 is 452228312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 894227 + ... + 917826.

Almost surely, 2^21382225400 is an apocalyptic number.

21382225400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21382225400 is an abundant number, since it is smaller than the sum of its proper divisors (29174081200).

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

21382225400 is a wasteful number, since it uses less digits than its factorization.

21382225400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1812128 (or 1812119 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The spelling of 21382225400 in words is "twenty-one billion, three hundred eighty-two million, two hundred twenty-five thousand, four hundred".