21474076 has 24 divisors (see below), whose sum is σ = 40600224. Its totient is φ = 9879360.

The previous prime is 21474073. The next prime is 21474083. The reversal of 21474076 is 67047412.

It is a super-2 number, since 2×21474076² = 922271880107552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21474073) 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, 25746 + ... + 26566.

It is an arithmetic number, because the mean of its divisors is an integer number (1691676).

Almost surely, 2^21474076 is an apocalyptic number.

21474076 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21474076 is a deficient number, since it is larger than the sum of its proper divisors (19126148).

21474076 is a wasteful number, since it uses less digits than its factorization.

21474076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1341 (or 1339 counting only the distinct ones).

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

The square root of 21474076 is about 4634.0129477592. The cubic root of 21474076 is about 277.9530828472.

The spelling of 21474076 in words is "twenty-one million, four hundred seventy-four thousand, seventy-six".