20210099 has 12 divisors (see below), whose sum is σ = 25318944. Its totient is φ = 15989904.

The previous prime is 20210087. The next prime is 20210101. The reversal of 20210099 is 99001202.

It is not a de Polignac number, because 20210099 - 2⁴ = 20210083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20210039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15227 + ... + 16500.

It is an arithmetic number, because the mean of its divisors is an integer number (2109912).

Almost surely, 2^20210099 is an apocalyptic number.

20210099 is a deficient number, since it is larger than the sum of its proper divisors (5108845).

20210099 is a wasteful number, since it uses less digits than its factorization.

20210099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31754 (or 31747 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 20210099 is about 4495.5643694646. The cubic root of 20210099 is about 272.3889466960.

It can be divided in two parts, 202 and 10099, that added together give a palindrome (10301).

The spelling of 20210099 in words is "twenty million, two hundred ten thousand, ninety-nine".