20013172621522 has 8 divisors (see below), whose sum is σ = 30019837116672. Its totient is φ = 10006560249300.

The previous prime is 20013172621513. The next prime is 20013172621577. The reversal of 20013172621522 is 22512627131002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12056254 + ... + 13615417.

It is an arithmetic number, because the mean of its divisors is an integer number (3752479639584).

Almost surely, 2^{20013172621522} is an apocalyptic number.

20013172621522 is a deficient number, since it is larger than the sum of its proper divisors (10006664495150).

20013172621522 is a wasteful number, since it uses less digits than its factorization.

20013172621522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26061464.

The product of its (nonzero) digits is 20160, while the sum is 34.

Adding to 20013172621522 its reverse (22512627131002), we get a palindrome (42525799752524).

The spelling of 20013172621522 in words is "twenty trillion, thirteen billion, one hundred seventy-two million, six hundred twenty-one thousand, five hundred twenty-two".