20159534 has 8 divisors (see below), whose sum is σ = 30653760. Its totient is φ = 9941616.

The previous prime is 20159521. The next prime is 20159537. The reversal of 20159534 is 43595102.

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

It is a super-2 number, since 2×20159534² = 812813622194312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20159497 and 20159506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20159537) 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, 68894 + ... + 69185.

It is an arithmetic number, because the mean of its divisors is an integer number (3831720).

Almost surely, 2^20159534 is an apocalyptic number.

20159534 is a deficient number, since it is larger than the sum of its proper divisors (10494226).

20159534 is a wasteful number, since it uses less digits than its factorization.

20159534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138154.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 20159534 is about 4489.9369706044. The cubic root of 20159534 is about 272.1615875936.

The spelling of 20159534 in words is "twenty million, one hundred fifty-nine thousand, five hundred thirty-four".