21383104 has 28 divisors (see below), whose sum is σ = 42646600. Its totient is φ = 10637568.

The previous prime is 21383101. The next prime is 21383107. The reversal of 21383104 is 40138312.

It is an interprime number because it is at equal distance from previous prime (21383101) and next prime (21383107).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21383101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13927 + ... + 15385.

Almost surely, 2^21383104 is an apocalyptic number.

It is an amenable number.

21383104 is a deficient number, since it is larger than the sum of its proper divisors (21263496).

21383104 is a wasteful number, since it uses less digits than its factorization.

21383104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700 (or 1690 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 21383104 is about 4624.1868474360. The cubic root of 21383104 is about 277.5600238093.

The spelling of 21383104 in words is "twenty-one million, three hundred eighty-three thousand, one hundred four".