20081061 has 64 divisors (see below), whose sum is σ = 39997440. Its totient is φ = 9616320.

The previous prime is 20081057. The next prime is 20081077. The reversal of 20081061 is 16018002.

It is not a de Polignac number, because 20081061 - 2² = 20081057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20081041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26656 + ... + 27398.

It is an arithmetic number, because the mean of its divisors is an integer number (624960).

Almost surely, 2^20081061 is an apocalyptic number.

20081061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20081061 is a deficient number, since it is larger than the sum of its proper divisors (19916379).

20081061 is a wasteful number, since it uses less digits than its factorization.

20081061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783 (or 777 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 20081061 is about 4481.1896857866. The cubic root of 20081061 is about 271.8079896681.

Adding to 20081061 its reverse (16018002), we get a palindrome (36099063).

The spelling of 20081061 in words is "twenty million, eighty-one thousand, sixty-one".