21741698 has 16 divisors (see below), whose sum is σ = 35782560. Its totient is φ = 9825600.

The previous prime is 21741689. The next prime is 21741743. The reversal of 21741698 is 89614712.

It is a Curzon number.

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, 1178 + ... + 6698.

It is an arithmetic number, because the mean of its divisors is an integer number (2236410).

Almost surely, 2^21741698 is an apocalyptic number.

21741698 is a deficient number, since it is larger than the sum of its proper divisors (14040862).

21741698 is a wasteful number, since it uses less digits than its factorization.

21741698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713.

The product of its digits is 24192, while the sum is 38.

The square root of 21741698 is about 4662.7993737668. The cubic root of 21741698 is about 279.1029882333.

The spelling of 21741698 in words is "twenty-one million, seven hundred forty-one thousand, six hundred ninety-eight".