21476992 has 32 divisors (see below), whose sum is σ = 45043200. Its totient is φ = 10172160.

The previous prime is 21476981. The next prime is 21476993. The reversal of 21476992 is 29967412.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×21476992² = 922522370736128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21476993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1984 + ... + 6847.

It is an arithmetic number, because the mean of its divisors is an integer number (1407600).

Almost surely, 2^21476992 is an apocalyptic number.

It is an amenable number.

21476992 is an abundant number, since it is smaller than the sum of its proper divisors (23566208).

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

21476992 is an equidigital number, since it uses as much as digits as its factorization.

21476992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8864 (or 8852 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 21476992 is about 4634.3275671881. The cubic root of 21476992 is about 277.9656635128.

The spelling of 21476992 in words is "twenty-one million, four hundred seventy-six thousand, nine hundred ninety-two".