20535544553502 has 96 divisors (see below), whose sum is σ = 46028409957504. Its totient is φ = 6056844184000.

The previous prime is 20535544553501. The next prime is 20535544553519.

It is a happy number.

20535544553502 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535544553501) 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, 22761853 + ... + 23646839.

It is an arithmetic number, because the mean of its divisors is an integer number (479462603724).

Almost surely, 2^{20535544553502} is an apocalyptic number.

20535544553502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20535544553502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23014204978752).

20535544553502 is an abundant number, since it is smaller than the sum of its proper divisors (25492865404002).

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

20535544553502 is a wasteful number, since it uses less digits than its factorization.

20535544553502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885222 (or 885163 counting only the distinct ones).

The product of its (nonzero) digits is 9000000, while the sum is 48.

The spelling of 20535544553502 in words is "twenty trillion, five hundred thirty-five billion, five hundred forty-four million, five hundred fifty-three thousand, five hundred two".