21402914 has 16 divisors (see below), whose sum is σ = 34732152. Its totient is φ = 9833088.

The previous prime is 21402893. The next prime is 21402919. The reversal of 21402914 is 41920412.

It can be written as a sum of positive squares in 4 ways, for example, as 15077689 + 6325225 = 3883^2 + 2515^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21402914.

It is not an unprimeable number, because it can be changed into a prime (21402919) 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, 4292 + ... + 7824.

Almost surely, 2^21402914 is an apocalyptic number.

21402914 is a deficient number, since it is larger than the sum of its proper divisors (13329238).

21402914 is a wasteful number, since it uses less digits than its factorization.

21402914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781.

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

The square root of 21402914 is about 4626.3283497824. The cubic root of 21402914 is about 277.6457108851.

The spelling of 21402914 in words is "twenty-one million, four hundred two thousand, nine hundred fourteen".