21675084 has 24 divisors (see below), whose sum is σ = 51652608. Its totient is φ = 7071120.

The previous prime is 21675083. The next prime is 21675091. The reversal of 21675084 is 48057612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21675083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18652 + ... + 19779.

It is an arithmetic number, because the mean of its divisors is an integer number (2152192).

Almost surely, 2^21675084 is an apocalyptic number.

It is an amenable number.

21675084 is an abundant number, since it is smaller than the sum of its proper divisors (29977524).

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

21675084 is a wasteful number, since it uses less digits than its factorization.

21675084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38485 (or 38483 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 21675084 is about 4655.6507600979. The cubic root of 21675084 is about 278.8176504013.

The spelling of 21675084 in words is "twenty-one million, six hundred seventy-five thousand, eighty-four".