20355102513530 has 64 divisors (see below), whose sum is σ = 38352216268800. Its totient is φ = 7763602201344.

The previous prime is 20355102513521. The next prime is 20355102513547. The reversal of 20355102513530 is 3531520155302.

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, 311174087 + ... + 311239493.

It is an arithmetic number, because the mean of its divisors is an integer number (599253379200).

Almost surely, 2^{20355102513530} is an apocalyptic number.

20355102513530 is a deficient number, since it is larger than the sum of its proper divisors (17997113755270).

20355102513530 is a wasteful number, since it uses less digits than its factorization.

20355102513530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69663.

The product of its (nonzero) digits is 67500, while the sum is 35.

Adding to 20355102513530 its reverse (3531520155302), we get a palindrome (23886622668832).

The spelling of 20355102513530 in words is "twenty trillion, three hundred fifty-five billion, one hundred two million, five hundred thirteen thousand, five hundred thirty".