21885002 has 4 divisors (see below), whose sum is σ = 32827506. Its totient is φ = 10942500.

The previous prime is 21884987. The next prime is 21885013. The reversal of 21885002 is 20058812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 16072081 + 5812921 = 4009^2 + 2411^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5471249 + ... + 5471252.

Almost surely, 2^21885002 is an apocalyptic number.

21885002 is a deficient number, since it is larger than the sum of its proper divisors (10942504).

21885002 is a wasteful number, since it uses less digits than its factorization.

21885002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10942503.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 21885002 is about 4678.1408700466. The cubic root of 21885002 is about 279.7148542704.

The spelling of 21885002 in words is "twenty-one million, eight hundred eighty-five thousand, two".