188400382031 has 2 divisors, whose sum is σ = 188400382032. Its totient is φ = 188400382030.

The previous prime is 188400382007. The next prime is 188400382073. The reversal of 188400382031 is 130283004881.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188400382031 is a prime.

It is a super-2 number, since 2×188400382031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188400382091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94200191015 + 94200191016.

It is an arithmetic number, because the mean of its divisors is an integer number (94200191016).

Almost surely, 2^188400382031 is an apocalyptic number.

188400382031 is a deficient number, since it is larger than the sum of its proper divisors (1).

188400382031 is an equidigital number, since it uses as much as digits as its factorization.

188400382031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 38.

The spelling of 188400382031 in words is "one hundred eighty-eight billion, four hundred million, three hundred eighty-two thousand, thirty-one".