20115213160 has 128 divisors (see below), whose sum is σ = 54001728000. Its totient is φ = 6597448704.

The previous prime is 20115213143. The next prime is 20115213191. The reversal of 20115213160 is 6131251102.

20115213160 = T₁₃₉₇₆ + T₁₃₉₇₇ + ... + T₁₄₁₇₈.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 873717 + ... + 896443.

It is an arithmetic number, because the mean of its divisors is an integer number (421888500).

Almost surely, 2^20115213160 is an apocalyptic number.

20115213160 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 20115213160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27000864000).

20115213160 is an abundant number, since it is smaller than the sum of its proper divisors (33886514840).

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

20115213160 is a wasteful number, since it uses less digits than its factorization.

20115213160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22883 (or 22879 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 20115213160 its reverse (6131251102), we get a palindrome (26246464262).

The spelling of 20115213160 in words is "twenty billion, one hundred fifteen million, two hundred thirteen thousand, one hundred sixty".