20159930 has 32 divisors (see below), whose sum is σ = 42906240. Its totient is φ = 6672960.

The previous prime is 20159929. The next prime is 20159933. The reversal of 20159930 is 3995102.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 20159893 and 20159902.

It is not an unprimeable number, because it can be changed into a prime (20159933) 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, 2936 + ... + 6995.

It is an arithmetic number, because the mean of its divisors is an integer number (1340820).

Almost surely, 2^20159930 is an apocalyptic number.

20159930 is an abundant number, since it is smaller than the sum of its proper divisors (22746310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20159930 is a wasteful number, since it uses less digits than its factorization.

20159930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9974.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 20159930 is about 4489.9810690024. The cubic root of 20159930 is about 272.1633696335.

The spelling of 20159930 in words is "twenty million, one hundred fifty-nine thousand, nine hundred thirty".