21794925 has 24 divisors (see below), whose sum is σ = 36720864. Its totient is φ = 11402560.

The previous prime is 21794879. The next prime is 21794933. The reversal of 21794925 is 52949712.

It is not a de Polignac number, because 21794925 - 2¹¹ = 21792877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1234 + ... + 6716.

It is an arithmetic number, because the mean of its divisors is an integer number (1530036).

Almost surely, 2^21794925 is an apocalyptic number.

21794925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21794925 is a deficient number, since it is larger than the sum of its proper divisors (14925939).

21794925 is a wasteful number, since it uses less digits than its factorization.

21794925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5549 (or 5544 counting only the distinct ones).

The product of its digits is 45360, while the sum is 39.

The square root of 21794925 is about 4668.5035075493. The cubic root of 21794925 is about 279.3305648791.

The spelling of 21794925 in words is "twenty-one million, seven hundred ninety-four thousand, nine hundred twenty-five".