21854002 has 16 divisors (see below), whose sum is σ = 34369920. Its totient is φ = 10401952.

The previous prime is 21853999. The next prime is 21854011. The reversal of 21854002 is 20045812.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9699 + ... + 11737.

It is an arithmetic number, because the mean of its divisors is an integer number (2148120).

Almost surely, 2^21854002 is an apocalyptic number.

21854002 is a deficient number, since it is larger than the sum of its proper divisors (12515918).

21854002 is a wasteful number, since it uses less digits than its factorization.

21854002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 21854002 is about 4674.8264138896. The cubic root of 21854002 is about 279.5827202801.

Adding to 21854002 its reverse (20045812), we get a palindrome (41899814).

The spelling of 21854002 in words is "twenty-one million, eight hundred fifty-four thousand, two".