21907102 has 16 divisors (see below), whose sum is σ = 37929312. Its totient is φ = 9295200.

The previous prime is 21907097. The next prime is 21907117. The reversal of 21907102 is 20170912.

It is a super-2 number, since 2×21907102² = 959842236076808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6333 + ... + 9160.

It is an arithmetic number, because the mean of its divisors is an integer number (2370582).

Almost surely, 2^21907102 is an apocalyptic number.

21907102 is a deficient number, since it is larger than the sum of its proper divisors (16022210).

21907102 is a wasteful number, since it uses less digits than its factorization.

21907102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15603.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 21907102 is about 4680.5023234691. The cubic root of 21907102 is about 279.8089768516.

The spelling of 21907102 in words is "twenty-one million, nine hundred seven thousand, one hundred two".