21840762 has 16 divisors (see below), whose sum is σ = 43755552. Its totient is φ = 7267920.

The previous prime is 21840757. The next prime is 21840773. The reversal of 21840762 is 26704812.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213 + ... + 6719.

It is an arithmetic number, because the mean of its divisors is an integer number (2734722).

Almost surely, 2^21840762 is an apocalyptic number.

21840762 is an abundant number, since it is smaller than the sum of its proper divisors (21914790).

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

21840762 is a wasteful number, since it uses less digits than its factorization.

21840762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6173.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 21840762 is about 4673.4101039819. The cubic root of 21840762 is about 279.5262481976.

The spelling of 21840762 in words is "twenty-one million, eight hundred forty thousand, seven hundred sixty-two".