20231887 has 16 divisors (see below), whose sum is σ = 23617440. Its totient is φ = 17160192.

The previous prime is 20231873. The next prime is 20231909. The reversal of 20231887 is 78813202.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20231887 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 (20231807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8439 + ... + 10567.

It is an arithmetic number, because the mean of its divisors is an integer number (1476090).

Almost surely, 2^20231887 is an apocalyptic number.

20231887 is a deficient number, since it is larger than the sum of its proper divisors (3385553).

20231887 is a wasteful number, since it uses less digits than its factorization.

20231887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 20231887 is about 4497.9869942009. The cubic root of 20231887 is about 272.4867967679.

The spelling of 20231887 in words is "twenty million, two hundred thirty-one thousand, eight hundred eighty-seven".