20102199 has 16 divisors (see below), whose sum is σ = 29538432. Its totient is φ = 12081888.

The previous prime is 20102153. The next prime is 20102213. The reversal of 20102199 is 99120102.

It is not a de Polignac number, because 20102199 - 2¹¹ = 20100151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4317 + ... + 7670.

It is an arithmetic number, because the mean of its divisors is an integer number (1846152).

Almost surely, 2^20102199 is an apocalyptic number.

20102199 is a deficient number, since it is larger than the sum of its proper divisors (9436233).

20102199 is a wasteful number, since it uses less digits than its factorization.

20102199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12046.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 20102199 is about 4483.5475909150. The cubic root of 20102199 is about 271.9033276336.

It can be divided in two parts, 20102 and 199, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 20102199 in words is "twenty million, one hundred two thousand, one hundred ninety-nine".