20133771 has 16 divisors (see below), whose sum is σ = 30760704. Its totient is φ = 11474784.

The previous prime is 20133769. The next prime is 20133779. The reversal of 20133771 is 17733102.

It is not a de Polignac number, because 20133771 - 2¹ = 20133769 is a prime.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (20133779) 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, 8781 + ... + 10833.

It is an arithmetic number, because the mean of its divisors is an integer number (1922544).

Almost surely, 2^20133771 is an apocalyptic number.

20133771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20133771 is a deficient number, since it is larger than the sum of its proper divisors (10626933).

20133771 is a wasteful number, since it uses less digits than its factorization.

20133771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2530.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 20133771 is about 4487.0670821819. The cubic root of 20133771 is about 272.0456013149.

Adding to 20133771 its reverse (17733102), we get a palindrome (37866873).

The spelling of 20133771 in words is "twenty million, one hundred thirty-three thousand, seven hundred seventy-one".