21848925 has 24 divisors (see below), whose sum is σ = 41285056. Its totient is φ = 9987840.

The previous prime is 21848923. The next prime is 21848947. The reversal of 21848925 is 52984812.

It is not a de Polignac number, because 21848925 - 2¹ = 21848923 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21848921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20284 + ... + 21333.

Almost surely, 2^21848925 is an apocalyptic number.

21848925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21848925 is a deficient number, since it is larger than the sum of its proper divisors (19436131).

21848925 is a wasteful number, since it uses less digits than its factorization.

21848925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41637 (or 41632 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 21848925 is about 4674.2833675335. The cubic root of 21848925 is about 279.5610682366.

The spelling of 21848925 in words is "twenty-one million, eight hundred forty-eight thousand, nine hundred twenty-five".