20022579 has 16 divisors (see below), whose sum is σ = 30151840. Its totient is φ = 13128480.

The previous prime is 20022577. The next prime is 20022593. The reversal of 20022579 is 97522002.

It is a happy number.

It is not a de Polignac number, because 20022579 - 2¹ = 20022577 is a prime.

It is a super-2 number, since 2×20022579² = 801807339622482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022571) 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 15 ways as a sum of consecutive naturals, for example, 4432 + ... + 7725.

It is an arithmetic number, because the mean of its divisors is an integer number (1884490).

Almost surely, 2^20022579 is an apocalyptic number.

20022579 is a deficient number, since it is larger than the sum of its proper divisors (10129261).

20022579 is a wasteful number, since it uses less digits than its factorization.

20022579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12227 (or 12221 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20022579 is about 4474.6596518618. The cubic root of 20022579 is about 271.5438713025.

The spelling of 20022579 in words is "twenty million, twenty-two thousand, five hundred seventy-nine".