21738596 has 24 divisors (see below), whose sum is σ = 41622336. Its totient is φ = 9852320.

The previous prime is 21738593. The next prime is 21738599. The reversal of 21738596 is 69583712.

It is an interprime number because it is at equal distance from previous prime (21738593) and next prime (21738599).

It is not an unprimeable number, because it can be changed into a prime (21738593) 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, 24065 + ... + 24951.

It is an arithmetic number, because the mean of its divisors is an integer number (1734264).

Almost surely, 2^21738596 is an apocalyptic number.

It is an amenable number.

21738596 is a deficient number, since it is larger than the sum of its proper divisors (19883740).

21738596 is a wasteful number, since it uses less digits than its factorization.

21738596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459 (or 1457 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 21738596 is about 4662.4667291038. The cubic root of 21738596 is about 279.0897139152.

The spelling of 21738596 in words is "twenty-one million, seven hundred thirty-eight thousand, five hundred ninety-six".