20231087 has 4 divisors (see below), whose sum is σ = 20243496. Its totient is φ = 20218680.

The previous prime is 20231083. The next prime is 20231093. The reversal of 20231087 is 78013202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20231087 - 2² = 20231083 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 (20231083) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3308 + ... + 7169.

It is an arithmetic number, because the mean of its divisors is an integer number (5060874).

Almost surely, 2^20231087 is an apocalyptic number.

20231087 is a deficient number, since it is larger than the sum of its proper divisors (12409).

20231087 is a wasteful number, since it uses less digits than its factorization.

20231087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12408.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20231087 is about 4497.8980646520. The cubic root of 20231087 is about 272.4832052046.

Adding to 20231087 its reverse (78013202), we get a palindrome (98244289).

The spelling of 20231087 in words is "twenty million, two hundred thirty-one thousand, eighty-seven".