20015332166 has 4 divisors (see below), whose sum is σ = 30022998252. Its totient is φ = 10007666082.

The previous prime is 20015332147. The next prime is 20015332171. The reversal of 20015332166 is 66123351002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66123351002 = 2 ⋅33061675501.

It is a super-2 number, since 2×20015332166² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5003833040 + ... + 5003833043.

It is an arithmetic number, because the mean of its divisors is an integer number (7505749563).

Almost surely, 2^20015332166 is an apocalyptic number.

20015332166 is a deficient number, since it is larger than the sum of its proper divisors (10007666086).

20015332166 is a wasteful number, since it uses less digits than its factorization.

20015332166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10007666085.

The product of its (nonzero) digits is 6480, while the sum is 29.

Adding to 20015332166 its reverse (66123351002), we get a palindrome (86138683168).

The spelling of 20015332166 in words is "twenty billion, fifteen million, three hundred thirty-two thousand, one hundred sixty-six".