210669742 has 16 divisors (see below), whose sum is σ = 332670240. Its totient is φ = 99860992.

The previous prime is 210669733. The next prime is 210669743. The reversal of 210669742 is 247966012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210669743) by changing a digit.

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, 15067 + ... + 25462.

It is an arithmetic number, because the mean of its divisors is an integer number (20791890).

Almost surely, 2^210669742 is an apocalyptic number.

210669742 is a deficient number, since it is larger than the sum of its proper divisors (122000498).

210669742 is a wasteful number, since it uses less digits than its factorization.

210669742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40667.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 210669742 is about 14514.4666453852. The cubic root of 210669742 is about 595.0234126795.

The spelling of 210669742 in words is "two hundred ten million, six hundred sixty-nine thousand, seven hundred forty-two".