21497096 has 16 divisors (see below), whose sum is σ = 40875840. Its totient is φ = 10596880.

The previous prime is 21497093. The next prime is 21497101. The reversal of 21497096 is 69079412.

It is not an unprimeable number, because it can be changed into a prime (21497093) 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, 18356 + ... + 19491.

It is an arithmetic number, because the mean of its divisors is an integer number (2554740).

Almost surely, 2^21497096 is an apocalyptic number.

It is an amenable number.

21497096 is a deficient number, since it is larger than the sum of its proper divisors (19378744).

21497096 is a wasteful number, since it uses less digits than its factorization.

21497096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37924 (or 37920 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 21497096 is about 4636.4960907996. The cubic root of 21497096 is about 278.0523683758.

The spelling of 21497096 in words is "twenty-one million, four hundred ninety-seven thousand, ninety-six".