21394002 has 32 divisors (see below), whose sum is σ = 51028992. Its totient is φ = 5846544.

The previous prime is 21393989. The next prime is 21394063. The reversal of 21394002 is 20049312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 21394002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10108 + ... + 12039.

It is an arithmetic number, because the mean of its divisors is an integer number (1594656).

Almost surely, 2^21394002 is an apocalyptic number.

21394002 is an abundant number, since it is smaller than the sum of its proper divisors (29634990).

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

21394002 is a wasteful number, since it uses less digits than its factorization.

21394002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22182.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 21394002 is about 4625.3650666731. The cubic root of 21394002 is about 277.6071690602.

The spelling of 21394002 in words is "twenty-one million, three hundred ninety-four thousand, two".