21763852 has 24 divisors (see below), whose sum is σ = 41751360. Its totient is φ = 9844560.

The previous prime is 21763849. The next prime is 21763871. The reversal of 21763852 is 25836712.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8899 + ... + 11077.

It is an arithmetic number, because the mean of its divisors is an integer number (1739640).

Almost surely, 2^21763852 is an apocalyptic number.

21763852 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21763852 is a deficient number, since it is larger than the sum of its proper divisors (19987508).

21763852 is a wasteful number, since it uses less digits than its factorization.

21763852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421 (or 2419 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 21763852 is about 4665.1743804492. The cubic root of 21763852 is about 279.1977546528.

The spelling of 21763852 in words is "twenty-one million, seven hundred sixty-three thousand, eight hundred fifty-two".