21476272 has 10 divisors (see below), whose sum is σ = 41610308. Its totient is φ = 10738128.

The previous prime is 21476263. The next prime is 21476281. The reversal of 21476272 is 27267412.

It is an interprime number because it is at equal distance from previous prime (21476263) and next prime (21476281).

It is a super-2 number, since 2×21476272² = 922460518035968, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 671118 + ... + 671149.

Almost surely, 2^21476272 is an apocalyptic number.

It is an amenable number.

21476272 is a deficient number, since it is larger than the sum of its proper divisors (20134036).

21476272 is a wasteful number, since it uses less digits than its factorization.

21476272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342275 (or 1342269 counting only the distinct ones).

The product of its digits is 9408, while the sum is 31.

The square root of 21476272 is about 4634.2498853644. The cubic root of 21476272 is about 277.9625572815.

The spelling of 21476272 in words is "twenty-one million, four hundred seventy-six thousand, two hundred seventy-two".