21903414 has 24 divisors (see below), whose sum is σ = 47437992. Its totient is φ = 6739200.

The previous prime is 21903407. The next prime is 21903421. The reversal of 21903414 is 41430912.

It is an interprime number because it is at equal distance from previous prime (21903407) and next prime (21903421).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9787 + ... + 11814.

It is an arithmetic number, because the mean of its divisors is an integer number (1976583).

Almost surely, 2^21903414 is an apocalyptic number.

21903414 is an abundant number, since it is smaller than the sum of its proper divisors (25534578).

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

21903414 is a wasteful number, since it uses less digits than its factorization.

21903414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21632 (or 21619 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 21903414 is about 4680.1083320795. The cubic root of 21903414 is about 279.7932742814.

The spelling of 21903414 in words is "twenty-one million, nine hundred three thousand, four hundred fourteen".