21270594 has 16 divisors (see below), whose sum is σ = 43124832. Its totient is φ = 6992928.

The previous prime is 21270593. The next prime is 21270629. The reversal of 21270594 is 49507212.

It is a super-2 number, since 2×21270594² = 904876338225672, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21270593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23844 + ... + 24719.

It is an arithmetic number, because the mean of its divisors is an integer number (2695302).

Almost surely, 2^21270594 is an apocalyptic number.

21270594 is an abundant number, since it is smaller than the sum of its proper divisors (21854238).

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

21270594 is a wasteful number, since it uses less digits than its factorization.

21270594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48641.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 21270594 is about 4612.0054206386. The cubic root of 21270594 is about 277.0723613773.

The spelling of 21270594 in words is "twenty-one million, two hundred seventy thousand, five hundred ninety-four".