23861881 has 2 divisors, whose sum is σ = 23861882. Its totient is φ = 23861880.

The previous prime is 23861869. The next prime is 23861911. The reversal of 23861881 is 18816832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18844281 + 5017600 = 4341^2 + 2240^2 .

It is a cyclic number.

It is not a de Polignac number, because 23861881 - 2¹⁷ = 23730809 is a prime.

It is a super-2 number, since 2×23861881² = 1138778729716322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23861881.

It is not a weakly prime, because it can be changed into another prime (23861801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11930940 + 11930941.

It is an arithmetic number, because the mean of its divisors is an integer number (11930941).

Almost surely, 2^23861881 is an apocalyptic number.

It is an amenable number.

23861881 is a deficient number, since it is larger than the sum of its proper divisors (1).

23861881 is an equidigital number, since it uses as much as digits as its factorization.

23861881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 37.

The square root of 23861881 is about 4884.8624340917. The cubic root of 23861881 is about 287.8955100946.

It can be divided in two parts, 23861 and 881, that added together give a palindrome (24742).

The spelling of 23861881 in words is "twenty-three million, eight hundred sixty-one thousand, eight hundred eighty-one".