21607166039 has 32 divisors (see below), whose sum is σ = 24230430720. Its totient is φ = 19169644032.

The previous prime is 21607165999. The next prime is 21607166051. The reversal of 21607166039 is 93066170612.

It is a de Polignac number, because none of the positive numbers 2^k-21607166039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21607165987 and 21607166005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21607166089) 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 in 31 ways as a sum of consecutive naturals, for example, 12117542 + ... + 12119324.

It is an arithmetic number, because the mean of its divisors is an integer number (757200960).

Almost surely, 2^21607166039 is an apocalyptic number.

21607166039 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21607166039 is a deficient number, since it is larger than the sum of its proper divisors (2623264681).

21607166039 is a wasteful number, since it uses less digits than its factorization.

21607166039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2399.

The product of its (nonzero) digits is 81648, while the sum is 41.

The spelling of 21607166039 in words is "twenty-one billion, six hundred seven million, one hundred sixty-six thousand, thirty-nine".