21794375 has 10 divisors (see below), whose sum is σ = 27235032. Its totient is φ = 17435000.

The previous prime is 21794359. The next prime is 21794431. The reversal of 21794375 is 57349712.

It is not a de Polignac number, because 21794375 - 2⁴ = 21794359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16811 + ... + 18060.

Almost surely, 2^21794375 is an apocalyptic number.

21794375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21794375 is a deficient number, since it is larger than the sum of its proper divisors (5440657).

21794375 is an frugal number, since it uses more digits than its factorization.

21794375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34891 (or 34876 counting only the distinct ones).

The product of its digits is 52920, while the sum is 38.

The square root of 21794375 is about 4668.4446017919. Note that the first 3 decimals coincide. The cubic root of 21794375 is about 279.3282152021.

The spelling of 21794375 in words is "twenty-one million, seven hundred ninety-four thousand, three hundred seventy-five".