20040771 has 8 divisors (see below), whose sum is σ = 26916624. Its totient is φ = 13262720.

The previous prime is 20040737. The next prime is 20040781. The reversal of 20040771 is 17704002.

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 20040771 - 2⁹ = 20040259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20040701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23970 + ... + 24791.

It is an arithmetic number, because the mean of its divisors is an integer number (3364578).

Almost surely, 2^20040771 is an apocalyptic number.

20040771 is a deficient number, since it is larger than the sum of its proper divisors (6875853).

20040771 is a wasteful number, since it uses less digits than its factorization.

20040771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48901.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20040771 is about 4476.6919706408. The cubic root of 20040771 is about 271.6260856660.

Adding to 20040771 its reverse (17704002), we get a palindrome (37744773).

The spelling of 20040771 in words is "twenty million, forty thousand, seven hundred seventy-one".