20133911 has 24 divisors (see below), whose sum is σ = 24689952. Its totient is φ = 16070400.

The previous prime is 20133889. The next prime is 20133937. The reversal of 20133911 is 11933102.

It is not a de Polignac number, because 20133911 - 2¹⁴ = 20117527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275771 + ... + 275843.

It is an arithmetic number, because the mean of its divisors is an integer number (1028748).

Almost surely, 2^20133911 is an apocalyptic number.

20133911 is a deficient number, since it is larger than the sum of its proper divisors (4556041).

20133911 is an equidigital number, since it uses as much as digits as its factorization.

20133911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 20133911 is about 4487.0826825455. The cubic root of 20133911 is about 272.0462318690.

The spelling of 20133911 in words is "twenty million, one hundred thirty-three thousand, nine hundred eleven".