20115320540016 has 80 divisors (see below), whose sum is σ = 56009240491680. Its totient is φ = 6184088417280.

The previous prime is 20115320539973. The next prime is 20115320540039. The reversal of 20115320540016 is 61004502351102.

It is a super-3 number, since 3×20115320540016³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12910851 + ... + 14384738.

It is an arithmetic number, because the mean of its divisors is an integer number (700115506146).

Almost surely, 2^{20115320540016} is an apocalyptic number.

20115320540016 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20115320540016 is an abundant number, since it is smaller than the sum of its proper divisors (35893919951664).

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

20115320540016 is a wasteful number, since it uses less digits than its factorization.

20115320540016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27296794 (or 27296788 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 20115320540016 its reverse (61004502351102), we get a palindrome (81119822891118).

The spelling of 20115320540016 in words is "twenty trillion, one hundred fifteen billion, three hundred twenty million, five hundred forty thousand, sixteen".