20166430605 has 16 divisors (see below), whose sum is σ = 33138351744. Its totient is φ = 10464742080.

The previous prime is 20166430597. The next prime is 20166430621. The reversal of 20166430605 is 50603466102.

It is not a de Polignac number, because 20166430605 - 2³ = 20166430597 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18167401 + ... + 18168510.

It is an arithmetic number, because the mean of its divisors is an integer number (2071146984).

Almost surely, 2^20166430605 is an apocalyptic number.

It is an amenable number.

20166430605 is a deficient number, since it is larger than the sum of its proper divisors (12971921139).

20166430605 is a wasteful number, since it uses less digits than its factorization.

20166430605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36335956.

The product of its (nonzero) digits is 25920, while the sum is 33.

Adding to 20166430605 its reverse (50603466102), we get a palindrome (70769896707).

The spelling of 20166430605 in words is "twenty billion, one hundred sixty-six million, four hundred thirty thousand, six hundred five".