20081087 has 12 divisors (see below), whose sum is σ = 22451904. Its totient is φ = 17933760.

The previous prime is 20081077. The next prime is 20081107. The reversal of 20081087 is 78018002.

It is not a de Polignac number, because 20081087 - 2⁶ = 20081023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20081027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3323 + ... + 7155.

It is an arithmetic number, because the mean of its divisors is an integer number (1870992).

Almost surely, 2^20081087 is an apocalyptic number.

20081087 is a deficient number, since it is larger than the sum of its proper divisors (2370817).

20081087 is a wasteful number, since it uses less digits than its factorization.

20081087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3890 (or 3877 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 20081087 is about 4481.1925868010. The cubic root of 20081087 is about 271.8081069761.

Adding to 20081087 its reverse (78018002), we get a palindrome (98099089).

The spelling of 20081087 in words is "twenty million, eighty-one thousand, eighty-seven".