21025468 has 6 divisors (see below), whose sum is σ = 36794576. Its totient is φ = 10512732.

The previous prime is 21025439. The next prime is 21025469. The reversal of 21025468 is 86452012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21025469) by changing a digit.

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 as a sum of consecutive naturals, namely, 2628180 + ... + 2628187.

Almost surely, 2^21025468 is an apocalyptic number.

It is an amenable number.

21025468 is a deficient number, since it is larger than the sum of its proper divisors (15769108).

21025468 is a wasteful number, since it uses less digits than its factorization.

21025468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256371 (or 5256369 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 21025468 is about 4585.3536395790. The cubic root of 21025468 is about 276.0039031864.

The spelling of 21025468 in words is "twenty-one million, twenty-five thousand, four hundred sixty-eight".