21763425 has 24 divisors (see below), whose sum is σ = 36118720. Its totient is φ = 11563200.

The previous prime is 21763403. The next prime is 21763429. The reversal of 21763425 is 52436712.

It is not a de Polignac number, because 21763425 - 2⁵ = 21763393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21763392 and 21763401.

It is not an unprimeable number, because it can be changed into a prime (21763429) 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, 32595 + ... + 33255.

Almost surely, 2^21763425 is an apocalyptic number.

21763425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21763425 is a deficient number, since it is larger than the sum of its proper divisors (14355295).

21763425 is a wasteful number, since it uses less digits than its factorization.

21763425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113 (or 1108 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 21763425 is about 4665.1286155904. The cubic root of 21763425 is about 279.1959287165.

The spelling of 21763425 in words is "twenty-one million, seven hundred sixty-three thousand, four hundred twenty-five".