20009061 has 24 divisors (see below), whose sum is σ = 29858400. Its totient is φ = 12904416.

The previous prime is 20009053. The next prime is 20009113. The reversal of 20009061 is 16090002.

It is not a de Polignac number, because 20009061 - 2³ = 20009053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20009761) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57490 + ... + 57836.

It is an arithmetic number, because the mean of its divisors is an integer number (1244100).

Almost surely, 2^20009061 is an apocalyptic number.

It is an amenable number.

20009061 is a deficient number, since it is larger than the sum of its proper divisors (9849339).

20009061 is a wasteful number, since it uses less digits than its factorization.

20009061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 20009061 is about 4473.1488908821. The cubic root of 20009061 is about 271.4827477006.

Adding to 20009061 its reverse (16090002), we get a palindrome (36099063).

The spelling of 20009061 in words is "twenty million, nine thousand, sixty-one".