20605532108372 has 48 divisors (see below), whose sum is σ = 37751848243200. Its totient is φ = 9822256260960.

The previous prime is 20605532108353. The next prime is 20605532108401. The reversal of 20605532108372 is 27380123550602.

It is a happy number.

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, 414248279 + ... + 414298017.

It is an arithmetic number, because the mean of its divisors is an integer number (786496838400).

Almost surely, 2^{20605532108372} is an apocalyptic number.

It is an amenable number.

20605532108372 is a deficient number, since it is larger than the sum of its proper divisors (17146316134828).

20605532108372 is a wasteful number, since it uses less digits than its factorization.

20605532108372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64556 (or 64554 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 44.

Adding to 20605532108372 its reverse (27380123550602), we get a palindrome (47985655658974).

The spelling of 20605532108372 in words is "twenty trillion, six hundred five billion, five hundred thirty-two million, one hundred eight thousand, three hundred seventy-two".