20159958 has 32 divisors (see below), whose sum is σ = 49625856. Its totient is φ = 5316768.

The previous prime is 20159957. The next prime is 20160001. The reversal of 20159958 is 85995102.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20159957) 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, 17916 + ... + 19007.

It is an arithmetic number, because the mean of its divisors is an integer number (1550808).

Almost surely, 2^20159958 is an apocalyptic number.

20159958 is an abundant number, since it is smaller than the sum of its proper divisors (29465898).

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

20159958 is a wasteful number, since it uses less digits than its factorization.

20159958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36948.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 20159958 is about 4489.9841870546. The cubic root of 20159958 is about 272.1634956354.

The spelling of 20159958 in words is "twenty million, one hundred fifty-nine thousand, nine hundred fifty-eight".