20221802 has 8 divisors (see below), whose sum is σ = 30601476. Its totient is φ = 10021312.

The previous prime is 20221801. The next prime is 20221811. The reversal of 20221802 is 20812202.

It can be written as a sum of positive squares in 2 ways, for example, as 11689561 + 8532241 = 3419^2 + 2921^2 .

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

It is a super-2 number, since 2×20221802² = 817842552254408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20221801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44513 + ... + 44964.

Almost surely, 2^20221802 is an apocalyptic number.

20221802 is a deficient number, since it is larger than the sum of its proper divisors (10379674).

20221802 is a wasteful number, since it uses less digits than its factorization.

20221802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89592.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 20221802 is about 4496.8657974194. The cubic root of 20221802 is about 272.4415136944.

The spelling of 20221802 in words is "twenty million, two hundred twenty-one thousand, eight hundred two".