20872099 has 8 divisors (see below), whose sum is σ = 21143232. Its totient is φ = 20602920.

The previous prime is 20872097. The next prime is 20872121. The reversal of 20872099 is 99027802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20872099 - 2¹ = 20872097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20872097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36792 + ... + 37354.

It is an arithmetic number, because the mean of its divisors is an integer number (2642904).

Almost surely, 2^20872099 is an apocalyptic number.

20872099 is a deficient number, since it is larger than the sum of its proper divisors (271133).

20872099 is a wasteful number, since it uses less digits than its factorization.

20872099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 20872099 is about 4568.5992382786. The cubic root of 20872099 is about 275.3311668747.

It can be divided in two parts, 2087 and 2099, that added together give a triangular number (4186 = T₉₁).

The spelling of 20872099 in words is "twenty million, eight hundred seventy-two thousand, ninety-nine".