20029156 has 48 divisors (see below), whose sum is σ = 41771520. Its totient is φ = 8225280.

The previous prime is 20029147. The next prime is 20029157. The reversal of 20029156 is 65192002.

It is a self number, because there is not a number n which added to its sum of digits gives 20029156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20029157) 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 15 ways as a sum of consecutive naturals, for example, 83685 + ... + 83923.

It is an arithmetic number, because the mean of its divisors is an integer number (870240).

Almost surely, 2^20029156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20029156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20885760).

20029156 is an abundant number, since it is smaller than the sum of its proper divisors (21742364).

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

20029156 is a wasteful number, since it uses less digits than its factorization.

20029156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 20029156 is about 4475.3945077501. The cubic root of 20029156 is about 271.5736002155.

The spelling of 20029156 in words is "twenty million, twenty-nine thousand, one hundred fifty-six".