20239111 has 8 divisors (see below), whose sum is σ = 21271184. Its totient is φ = 19232640.

The previous prime is 20239099. The next prime is 20239127. The reversal of 20239111 is 11193202.

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

It is a cyclic number.

It is not a de Polignac number, because 20239111 - 2¹³ = 20230919 is a prime.

It is a super-2 number, since 2×20239111² = 819243228140642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20239151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4770 + ... + 7951.

It is an arithmetic number, because the mean of its divisors is an integer number (2658898).

Almost surely, 2^20239111 is an apocalyptic number.

20239111 is a deficient number, since it is larger than the sum of its proper divisors (1032073).

20239111 is a wasteful number, since it uses less digits than its factorization.

20239111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12801.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 20239111 is about 4498.7899484195. The cubic root of 20239111 is about 272.5192242981.

The spelling of 20239111 in words is "twenty million, two hundred thirty-nine thousand, one hundred eleven".