20771080 has 32 divisors (see below), whose sum is σ = 50984640. Its totient is φ = 7552960.

The previous prime is 20771057. The next prime is 20771081. The reversal of 20771080 is 8017702.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20771081) 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, 23164 + ... + 24043.

It is an arithmetic number, because the mean of its divisors is an integer number (1593270).

Almost surely, 2^20771080 is an apocalyptic number.

20771080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20771080 is an abundant number, since it is smaller than the sum of its proper divisors (30213560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20771080 is a wasteful number, since it uses less digits than its factorization.

20771080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47229 (or 47225 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 20771080 is about 4557.5300328138. The cubic root of 20771080 is about 274.8862559906.

Adding to 20771080 its reverse (8017702), we get a palindrome (28788782).

The spelling of 20771080 in words is "twenty million, seven hundred seventy-one thousand, eighty".