20221699 has 4 divisors (see below), whose sum is σ = 20233864. Its totient is φ = 20209536.

The previous prime is 20221697. The next prime is 20221711. The reversal of 20221699 is 99612202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99612202 = 2 ⋅49806101.

It is a cyclic number.

It is not a de Polignac number, because 20221699 - 2¹ = 20221697 is a prime.

It is a super-2 number, since 2×20221699² = 817834220893202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20221699.

It is not an unprimeable number, because it can be changed into a prime (20221693) 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, 3102 + ... + 7075.

It is an arithmetic number, because the mean of its divisors is an integer number (5058466).

Almost surely, 2^20221699 is an apocalyptic number.

20221699 is a deficient number, since it is larger than the sum of its proper divisors (12165).

20221699 is a wasteful number, since it uses less digits than its factorization.

20221699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12164.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20221699 is about 4496.8543449838. The cubic root of 20221699 is about 272.4410511323.

It can be divided in two parts, 2022 and 1699, that added together give a square (3721 = 61²).

The spelling of 20221699 in words is "twenty million, two hundred twenty-one thousand, six hundred ninety-nine".