23400189881 has 2 divisors, whose sum is σ = 23400189882. Its totient is φ = 23400189880.

The previous prime is 23400189863. The next prime is 23400189961. The reversal of 23400189881 is 18898100432.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21516195856 + 1883994025 = 146684^2 + 43405^2 .

It is a cyclic number.

It is not a de Polignac number, because 23400189881 - 2¹⁴ = 23400173497 is a prime.

It is a super-2 number, since 2×23400189881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23400189821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11700094940 + 11700094941.

It is an arithmetic number, because the mean of its divisors is an integer number (11700094941).

Almost surely, 2^23400189881 is an apocalyptic number.

It is an amenable number.

23400189881 is a deficient number, since it is larger than the sum of its proper divisors (1).

23400189881 is an equidigital number, since it uses as much as digits as its factorization.

23400189881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 23400189881 in words is "twenty-three billion, four hundred million, one hundred eighty-nine thousand, eight hundred eighty-one".