21825796 has 6 divisors (see below), whose sum is σ = 38195150. Its totient is φ = 10912896.

The previous prime is 21825757. The next prime is 21825887. The reversal of 21825796 is 69752812.

It can be written as a sum of positive squares in only one way, i.e., 21752896 + 72900 = 4664^2 + 270^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2728221 + ... + 2728228.

Almost surely, 2^21825796 is an apocalyptic number.

It is an amenable number.

21825796 is a deficient number, since it is larger than the sum of its proper divisors (16369354).

21825796 is a wasteful number, since it uses less digits than its factorization.

21825796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5456453 (or 5456451 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The square root of 21825796 is about 4671.8086433415. The cubic root of 21825796 is about 279.4623867853.

The spelling of 21825796 in words is "twenty-one million, eight hundred twenty-five thousand, seven hundred ninety-six".