20238111 has 6 divisors (see below), whose sum is σ = 29232840. Its totient is φ = 13492068.

The previous prime is 20238089. The next prime is 20238131. The reversal of 20238111 is 11183202.

It is not a de Polignac number, because 20238111 - 2⁶ = 20238047 is a prime.

It is a super-2 number, since 2×20238111² = 819162273696642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20238131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1124331 + ... + 1124348.

It is an arithmetic number, because the mean of its divisors is an integer number (4872140).

Almost surely, 2^20238111 is an apocalyptic number.

20238111 is a deficient number, since it is larger than the sum of its proper divisors (8994729).

20238111 is a wasteful number, since it uses less digits than its factorization.

20238111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248685 (or 2248682 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 20238111 is about 4498.6788060496. The cubic root of 20238111 is about 272.5147358976.

The spelling of 20238111 in words is "twenty million, two hundred thirty-eight thousand, one hundred eleven".