21412092 has 48 divisors (see below), whose sum is σ = 55671840. Its totient is φ = 6359808.

The previous prime is 21412049. The next prime is 21412093. The reversal of 21412092 is 29021412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21412093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2158 + ... + 6890.

It is an arithmetic number, because the mean of its divisors is an integer number (1159830).

Almost surely, 2^21412092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21412092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27835920).

21412092 is an abundant number, since it is smaller than the sum of its proper divisors (34259748).

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

21412092 is a wasteful number, since it uses less digits than its factorization.

21412092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4782 (or 4780 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 21412092 is about 4627.3201747880. The cubic root of 21412092 is about 277.6853919021.

The spelling of 21412092 in words is "twenty-one million, four hundred twelve thousand, ninety-two".