20221138 has 16 divisors (see below), whose sum is σ = 34819200. Its totient is φ = 8627616.

The previous prime is 20221133. The next prime is 20221141. The reversal of 20221138 is 83112202.

It is not an unprimeable number, because it can be changed into a prime (20221133) 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, 163 + ... + 6361.

It is an arithmetic number, because the mean of its divisors is an integer number (2176200).

Almost surely, 2^20221138 is an apocalyptic number.

20221138 is a deficient number, since it is larger than the sum of its proper divisors (14598062).

20221138 is a wasteful number, since it uses less digits than its factorization.

20221138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6441.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 20221138 is about 4496.7919676142. The cubic root of 20221138 is about 272.4385317125.

It can be divided in two parts, 2022 and 1138, that added together give a triangular number (3160 = T₇₉).

The spelling of 20221138 in words is "twenty million, two hundred twenty-one thousand, one hundred thirty-eight".