21412320400 has 60 divisors (see below), whose sum is σ = 51701800000. Its totient is φ = 8521856640.

The previous prime is 21412320383. The next prime is 21412320409. The reversal of 21412320400 is 402321412.

It is not an unprimeable number, because it can be changed into a prime (21412320409) 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, 54900 + ... + 214099.

Almost surely, 2^21412320400 is an apocalyptic number.

21412320400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21412320400 is an abundant number, since it is smaller than the sum of its proper divisors (30289479600).

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

21412320400 is a wasteful number, since it uses less digits than its factorization.

21412320400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269216 (or 269205 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21412320400 its reverse (402321412), we get a palindrome (21814641812).

The spelling of 21412320400 in words is "twenty-one billion, four hundred twelve million, three hundred twenty thousand, four hundred".