20099670 has 16 divisors (see below), whose sum is σ = 48239280. Its totient is φ = 5359904.

The previous prime is 20099633. The next prime is 20099689. The reversal of 20099670 is 7699002.

It is a congruent 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, 334965 + ... + 335024.

It is an arithmetic number, because the mean of its divisors is an integer number (3014955).

Almost surely, 2^20099670 is an apocalyptic number.

20099670 is an abundant number, since it is smaller than the sum of its proper divisors (28139610).

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

20099670 is a wasteful number, since it uses less digits than its factorization.

20099670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669999.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 20099670 is about 4483.2655509126. The cubic root of 20099670 is about 271.8919246962.

The spelling of 20099670 in words is "twenty million, ninety-nine thousand, six hundred seventy".