20159770 has 8 divisors (see below), whose sum is σ = 36287604. Its totient is φ = 8063904.

The previous prime is 20159767. The next prime is 20159771. The reversal of 20159770 is 7795102.

It can be written as a sum of positive squares in 2 ways, for example, as 20151121 + 8649 = 4489^2 + 93^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20159771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1007979 + ... + 1007998.

Almost surely, 2^20159770 is an apocalyptic number.

20159770 is a deficient number, since it is larger than the sum of its proper divisors (16127834).

20159770 is a wasteful number, since it uses less digits than its factorization.

20159770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015984.

The product of its (nonzero) digits is 4410, while the sum is 31.

The square root of 20159770 is about 4489.9632515200. The cubic root of 20159770 is about 272.1626496202.

The spelling of 20159770 in words is "twenty million, one hundred fifty-nine thousand, seven hundred seventy".