21182371436159 has 16 divisors (see below), whose sum is σ = 21694216760832. Its totient is φ = 20671405197408.

The previous prime is 21182371436153. The next prime is 21182371436173. The reversal of 21182371436159 is 95163417328112.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21182371436159 - 2⁴ = 21182371436143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21182371436159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21182371436153) 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, 425469182 + ... + 425518964.

It is an arithmetic number, because the mean of its divisors is an integer number (1355888547552).

Almost surely, 2^{21182371436159} is an apocalyptic number.

21182371436159 is a deficient number, since it is larger than the sum of its proper divisors (511845324673).

21182371436159 is a wasteful number, since it uses less digits than its factorization.

21182371436159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58406.

The product of its digits is 2177280, while the sum is 53.

The spelling of 21182371436159 in words is "twenty-one trillion, one hundred eighty-two billion, three hundred seventy-one million, four hundred thirty-six thousand, one hundred fifty-nine".