21936803 has 8 divisors (see below), whose sum is σ = 25293408. Its totient is φ = 18635904.

The previous prime is 21936797. The next prime is 21936821. The reversal of 21936803 is 30863912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21936803 - 2⁴ = 21936787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21936803.

It is not an unprimeable number, because it can be changed into a prime (21936833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13076 + ... + 14657.

It is an arithmetic number, because the mean of its divisors is an integer number (3161676).

Almost surely, 2^21936803 is an apocalyptic number.

21936803 is a deficient number, since it is larger than the sum of its proper divisors (3356605).

21936803 is a wasteful number, since it uses less digits than its factorization.

21936803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27853.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 21936803 is about 4683.6740919923. The cubic root of 21936803 is about 279.9353719888.

The spelling of 21936803 in words is "twenty-one million, nine hundred thirty-six thousand, eight hundred three".