21763936 has 12 divisors (see below), whose sum is σ = 42847812. Its totient is φ = 10881952.

The previous prime is 21763909. The next prime is 21763943. The reversal of 21763936 is 63936712.

It is a junction number, because it is equal to n+sod(n) for n = 21763895 and 21763904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340030 + ... + 340093.

It is an arithmetic number, because the mean of its divisors is an integer number (3570651).

Almost surely, 2^21763936 is an apocalyptic number.

It is an amenable number.

21763936 is a deficient number, since it is larger than the sum of its proper divisors (21083876).

21763936 is an equidigital number, since it uses as much as digits as its factorization.

21763936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680133 (or 680125 counting only the distinct ones).

The product of its digits is 40824, while the sum is 37.

The square root of 21763936 is about 4665.1833833195. The cubic root of 21763936 is about 279.1981138506.

The spelling of 21763936 in words is "twenty-one million, seven hundred sixty-three thousand, nine hundred thirty-six".