21197024 has 12 divisors (see below), whose sum is σ = 41731704. Its totient is φ = 10598496.

The previous prime is 21197017. The next prime is 21197063. The reversal of 21197024 is 42079112.

It is a junction number, because it is equal to n+sod(n) for n = 21196984 and 21197002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331172 + ... + 331235.

It is an arithmetic number, because the mean of its divisors is an integer number (3477642).

Almost surely, 2^21197024 is an apocalyptic number.

It is an amenable number.

21197024 is a deficient number, since it is larger than the sum of its proper divisors (20534680).

21197024 is an equidigital number, since it uses as much as digits as its factorization.

21197024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662417 (or 662409 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 21197024 is about 4604.0225889976. The cubic root of 21197024 is about 276.7525495862.

The spelling of 21197024 in words is "twenty-one million, one hundred ninety-seven thousand, twenty-four".