20122999 has 24 divisors (see below), whose sum is σ = 23611392. Its totient is φ = 17091360.

The previous prime is 20122997. The next prime is 20123017. The reversal of 20122999 is 99922102.

It is not a de Polignac number, because 20122999 - 2¹ = 20122997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120414 + ... + 120580.

It is an arithmetic number, because the mean of its divisors is an integer number (983808).

Almost surely, 2^20122999 is an apocalyptic number.

20122999 is a deficient number, since it is larger than the sum of its proper divisors (3488393).

20122999 is a wasteful number, since it uses less digits than its factorization.

20122999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 20122999 is about 4485.8665829469. The cubic root of 20122999 is about 271.9970759129.

The spelling of 20122999 in words is "twenty million, one hundred twenty-two thousand, nine hundred ninety-nine".