20020035156 has 72 divisors (see below), whose sum is σ = 51374397312. Its totient is φ = 6063340800.

The previous prime is 20020035137. The next prime is 20020035157. The reversal of 20020035156 is 65153002002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020035157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4387116 + ... + 4391676.

It is an arithmetic number, because the mean of its divisors is an integer number (713533296).

Almost surely, 2^20020035156 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 20020035156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25687198656).

20020035156 is an abundant number, since it is smaller than the sum of its proper divisors (31354362156).

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

20020035156 is a wasteful number, since it uses less digits than its factorization.

20020035156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7613 (or 7600 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

Adding to 20020035156 its reverse (65153002002), we get a palindrome (85173037158).

The spelling of 20020035156 in words is "twenty billion, twenty million, thirty-five thousand, one hundred fifty-six".