21132186373 has 2 divisors, whose sum is σ = 21132186374. Its totient is φ = 21132186372.

The previous prime is 21132186359. The next prime is 21132186419. The reversal of 21132186373 is 37368123112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18300137284 + 2832049089 = 135278^2 + 53217^2 .

It is a cyclic number.

It is not a de Polignac number, because 21132186373 - 2³³ = 12542251781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132186323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10566093186 + 10566093187.

It is an arithmetic number, because the mean of its divisors is an integer number (10566093187).

Almost surely, 2^21132186373 is an apocalyptic number.

It is an amenable number.

21132186373 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132186373 is an equidigital number, since it uses as much as digits as its factorization.

21132186373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The spelling of 21132186373 in words is "twenty-one billion, one hundred thirty-two million, one hundred eighty-six thousand, three hundred seventy-three".