21146934 has 24 divisors (see below), whose sum is σ = 42985080. Its totient is φ = 6934752.

The previous prime is 21146921. The next prime is 21146953. The reversal of 21146934 is 43964112.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106167 + ... + 106365.

It is an arithmetic number, because the mean of its divisors is an integer number (1791045).

Almost surely, 2^21146934 is an apocalyptic number.

21146934 is an abundant number, since it is smaller than the sum of its proper divisors (21838146).

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

21146934 is an equidigital number, since it uses as much as digits as its factorization.

21146934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 293 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 21146934 is about 4598.5795633000. The cubic root of 21146934 is about 276.5343826565.

The spelling of 21146934 in words is "twenty-one million, one hundred forty-six thousand, nine hundred thirty-four".