20396111 has 4 divisors (see below), whose sum is σ = 20411832. Its totient is φ = 20380392.

The previous prime is 20396087. The next prime is 20396113. The reversal of 20396111 is 11169302.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20396111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20396113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5720 + ... + 8573.

It is an arithmetic number, because the mean of its divisors is an integer number (5102958).

Almost surely, 2^20396111 is an apocalyptic number.

20396111 is a deficient number, since it is larger than the sum of its proper divisors (15721).

20396111 is a wasteful number, since it uses less digits than its factorization.

20396111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15720.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 20396111 is about 4516.2053761980. The cubic root of 20396111 is about 273.2220773003. Note that the first 3 decimals are identical.

The spelling of 20396111 in words is "twenty million, three hundred ninety-six thousand, one hundred eleven".