21763368 has 48 divisors (see below), whose sum is σ = 64303200. Its totient is φ = 6594720.

The previous prime is 21763331. The next prime is 21763373. The reversal of 21763368 is 86336712.

It is a happy number.

21763368 is a `hidden beast` number, since 2 + 17 + 633 + 6 + 8 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12948 + ... + 14531.

It is an arithmetic number, because the mean of its divisors is an integer number (1339650).

Almost surely, 2^21763368 is an apocalyptic number.

It is an amenable number.

21763368 is an abundant number, since it is smaller than the sum of its proper divisors (42539832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21763368 is a wasteful number, since it uses less digits than its factorization.

21763368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27502 (or 27495 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 21763368 is about 4665.1225064300. The cubic root of 21763368 is about 279.1956849715.

The spelling of 21763368 in words is "twenty-one million, seven hundred sixty-three thousand, three hundred sixty-eight".