21092414 has 16 divisors (see below), whose sum is σ = 36446208. Its totient is φ = 8967672.

The previous prime is 21092411. The next prime is 21092419. The reversal of 21092414 is 41429012.

21092414 = 18² + 19² + ... + 398².

It is a self number, because there is not a number n which added to its sum of digits gives 21092414.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21092411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4154 + ... + 7709.

It is an arithmetic number, because the mean of its divisors is an integer number (2277888).

Almost surely, 2^21092414 is an apocalyptic number.

21092414 is a deficient number, since it is larger than the sum of its proper divisors (15353794).

21092414 is a wasteful number, since it uses less digits than its factorization.

21092414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11999.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 21092414 is about 4592.6478201578. The cubic root of 21092414 is about 276.2965289521.

The spelling of 21092414 in words is "twenty-one million, ninety-two thousand, four hundred fourteen".