20103135156 has 72 divisors (see below), whose sum is σ = 54835508000. Its totient is φ = 6173112384.

The previous prime is 20103135139. The next prime is 20103135229. The reversal of 20103135156 is 65153130102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 190491 + ... + 276573.

Almost surely, 2^20103135156 is an apocalyptic number.

20103135156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20103135156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27417754000).

20103135156 is an abundant number, since it is smaller than the sum of its proper divisors (34732372844).

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

20103135156 is a wasteful number, since it uses less digits than its factorization.

20103135156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86605 (or 86600 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

Adding to 20103135156 its reverse (65153130102), we get a palindrome (85256265258).

The spelling of 20103135156 in words is "twenty billion, one hundred three million, one hundred thirty-five thousand, one hundred fifty-six".