20220999 has 8 divisors (see below), whose sum is σ = 27062640. Its totient is φ = 13430016.

The previous prime is 20220983. The next prime is 20221009. The reversal of 20220999 is 99902202.

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

It is not a de Polignac number, because 20220999 - 2⁴ = 20220983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20224999) 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 7 ways as a sum of consecutive naturals, for example, 11722 + ... + 13335.

It is an arithmetic number, because the mean of its divisors is an integer number (3382830).

Almost surely, 2^20220999 is an apocalyptic number.

20220999 is a deficient number, since it is larger than the sum of its proper divisors (6841641).

20220999 is a wasteful number, since it uses less digits than its factorization.

20220999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25329.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 20220999 is about 4496.7765121251. The cubic root of 20220999 is about 272.4379074640.

The spelling of 20220999 in words is "twenty million, two hundred twenty thousand, nine hundred ninety-nine".