21412104 has 32 divisors (see below), whose sum is σ = 61177920. Its totient is φ = 6117696.

The previous prime is 21412099. The next prime is 21412123. The reversal of 21412104 is 40121412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63559 + ... + 63894.

It is an arithmetic number, because the mean of its divisors is an integer number (1911810).

Almost surely, 2^21412104 is an apocalyptic number.

21412104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21412104 is an abundant number, since it is smaller than the sum of its proper divisors (39765816).

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

21412104 is a wasteful number, since it uses less digits than its factorization.

21412104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127469 (or 127465 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 21412104 is about 4627.3214714346. The cubic root of 21412104 is about 277.6854437765.

Adding to 21412104 its reverse (40121412), we get a palindrome (61533516).

The spelling of 21412104 in words is "twenty-one million, four hundred twelve thousand, one hundred four".