13502555021020 has 96 divisors (see below), whose sum is σ = 32160249576000. Its totient is φ = 4720734203904.

The previous prime is 13502555020991. The next prime is 13502555021023. The reversal of 13502555021020 is 2012055520531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13502555021023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8926852 + ... + 10329268.

It is an arithmetic number, because the mean of its divisors is an integer number (335002599750).

Almost surely, 2^{13502555021020} is an apocalyptic number.

13502555021020 is a gapful number since it is divisible by the number (10) 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 13502555021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16080124788000).

13502555021020 is an abundant number, since it is smaller than the sum of its proper divisors (18657694554980).

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

13502555021020 is a wasteful number, since it uses less digits than its factorization.

13502555021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404407 (or 1404405 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 31.

The spelling of 13502555021020 in words is "thirteen trillion, five hundred two billion, five hundred fifty-five million, twenty-one thousand, twenty".