20133291 has 16 divisors (see below), whose sum is σ = 28464128. Its totient is φ = 12636000.

The previous prime is 20133277. The next prime is 20133301. The reversal of 20133291 is 19233102.

It is a happy number.

It is not a de Polignac number, because 20133291 - 2¹³ = 20125099 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (20133251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 516 + ... + 6366.

It is an arithmetic number, because the mean of its divisors is an integer number (1779008).

Almost surely, 2^20133291 is an apocalyptic number.

20133291 is a deficient number, since it is larger than the sum of its proper divisors (8330837).

20133291 is a wasteful number, since it uses less digits than its factorization.

20133291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 20133291 is about 4487.0135948089. The cubic root of 20133291 is about 272.0434393929.

Adding to 20133291 its reverse (19233102), we get a palindrome (39366393).

The spelling of 20133291 in words is "twenty million, one hundred thirty-three thousand, two hundred ninety-one".