21326193 has 32 divisors (see below), whose sum is σ = 36806400. Its totient is φ = 11950848.

The previous prime is 21326161. The next prime is 21326213. The reversal of 21326193 is 39162312.

It is not a de Polignac number, because 21326193 - 2⁵ = 21326161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21326593) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8953 + ... + 11081.

It is an arithmetic number, because the mean of its divisors is an integer number (1150200).

Almost surely, 2^21326193 is an apocalyptic number.

It is an amenable number.

21326193 is a deficient number, since it is larger than the sum of its proper divisors (15480207).

21326193 is a wasteful number, since it uses less digits than its factorization.

21326193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2198 (or 2192 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 21326193 is about 4618.0291250706. The cubic root of 21326193 is about 277.3135635960.

The spelling of 21326193 in words is "twenty-one million, three hundred twenty-six thousand, one hundred ninety-three".