21868802 has 8 divisors (see below), whose sum is σ = 32888700. Its totient is φ = 10905904.

The previous prime is 21868793. The next prime is 21868831. The reversal of 21868802 is 20886812.

It can be written as a sum of positive squares in 2 ways, for example, as 16801801 + 5067001 = 4099^2 + 2251^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13277 + ... + 14832.

Almost surely, 2^21868802 is an apocalyptic number.

21868802 is a deficient number, since it is larger than the sum of its proper divisors (11019898).

21868802 is a wasteful number, since it uses less digits than its factorization.

21868802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28500.

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 21868802 is about 4676.4090924554. The cubic root of 21868802 is about 279.6458191812.

The spelling of 21868802 in words is "twenty-one million, eight hundred sixty-eight thousand, eight hundred two".