20122899 has 4 divisors (see below), whose sum is σ = 26830536. Its totient is φ = 13415264.

The previous prime is 20122873. The next prime is 20122901. The reversal of 20122899 is 99822102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20122899 - 2⁵ = 20122867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20122819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3353814 + ... + 3353819.

It is an arithmetic number, because the mean of its divisors is an integer number (6707634).

Almost surely, 2^20122899 is an apocalyptic number.

20122899 is a deficient number, since it is larger than the sum of its proper divisors (6707637).

20122899 is an equidigital number, since it uses as much as digits as its factorization.

20122899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6707636.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 20122899 is about 4485.8554368147. The cubic root of 20122899 is about 271.9966253546.

The spelling of 20122899 in words is "twenty million, one hundred twenty-two thousand, eight hundred ninety-nine".