20013155700 has 144 divisors (see below), whose sum is σ = 59577020160. Its totient is φ = 5183239680.

The previous prime is 20013155699. The next prime is 20013155707. The reversal of 20013155700 is 755131002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013155707) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7868629 + ... + 7871171.

Almost surely, 2^20013155700 is an apocalyptic number.

20013155700 is a gapful number since it is divisible by the number (20) 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 20013155700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29788510080).

20013155700 is an abundant number, since it is smaller than the sum of its proper divisors (39563864460).

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

20013155700 is a wasteful number, since it uses less digits than its factorization.

20013155700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3306 (or 3299 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 24.

Adding to 20013155700 its reverse (755131002), we get a palindrome (20768286702).

The spelling of 20013155700 in words is "twenty billion, thirteen million, one hundred fifty-five thousand, seven hundred".