20222091 has 12 divisors (see below), whose sum is σ = 29999632. Its totient is φ = 13116816.

The previous prime is 20222087. The next prime is 20222101. The reversal of 20222091 is 19022202.

It is not a de Polignac number, because 20222091 - 2² = 20222087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20222011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30031 + ... + 30696.

Almost surely, 2^20222091 is an apocalyptic number.

20222091 is a deficient number, since it is larger than the sum of its proper divisors (9777541).

20222091 is a wasteful number, since it uses less digits than its factorization.

20222091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60770 (or 60767 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 20222091 is about 4496.8979307963. The cubic root of 20222091 is about 272.4428115548.

Adding to 20222091 its reverse (19022202), we get a palindrome (39244293).

It can be divided in two parts, 20 and 222091, that added together give a triangular number (222111 = T₆₆₆).

The spelling of 20222091 in words is "twenty million, two hundred twenty-two thousand, ninety-one".