21197676 has 24 divisors (see below), whose sum is σ = 51057664. Its totient is φ = 6837840.

The previous prime is 21197653. The next prime is 21197677. The reversal of 21197676 is 67679112.

It is not an unprimeable number, because it can be changed into a prime (21197677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28120 + ... + 28863.

Almost surely, 2^21197676 is an apocalyptic number.

It is an amenable number.

21197676 is an abundant number, since it is smaller than the sum of its proper divisors (29859988).

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

21197676 is a wasteful number, since it uses less digits than its factorization.

21197676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57021 (or 57019 counting only the distinct ones).

The product of its digits is 31752, while the sum is 39.

The square root of 21197676 is about 4604.0933960987. The cubic root of 21197676 is about 276.7553871042.

The spelling of 21197676 in words is "twenty-one million, one hundred ninety-seven thousand, six hundred seventy-six".