21625748 has 12 divisors (see below), whose sum is σ = 38378592. Its totient is φ = 10660440.

The previous prime is 21625741. The next prime is 21625753. The reversal of 21625748 is 84752612.

It is a super-3 number, since 3×21625748³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21625741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37790 + ... + 38357.

It is an arithmetic number, because the mean of its divisors is an integer number (3198216).

Almost surely, 2^21625748 is an apocalyptic number.

It is an amenable number.

21625748 is a deficient number, since it is larger than the sum of its proper divisors (16752844).

21625748 is a wasteful number, since it uses less digits than its factorization.

21625748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76222 (or 76220 counting only the distinct ones).

The product of its digits is 26880, while the sum is 35.

The square root of 21625748 is about 4650.3492341974. The cubic root of 21625748 is about 278.6059449920.

The spelling of 21625748 in words is "twenty-one million, six hundred twenty-five thousand, seven hundred forty-eight".