20346642331556 has 48 divisors (see below), whose sum is σ = 35823375372288. Its totient is φ = 10111547930400.

The previous prime is 20346642331541. The next prime is 20346642331559. The reversal of 20346642331556 is 65513324664302.

It is a happy number.

It is a super-2 number, since 2×20346642331556² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20346642331559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3678652511 + ... + 3678658041.

It is an arithmetic number, because the mean of its divisors is an integer number (746320320256).

Almost surely, 2^{20346642331556} is an apocalyptic number.

It is an amenable number.

20346642331556 is a deficient number, since it is larger than the sum of its proper divisors (15476733040732).

20346642331556 is a wasteful number, since it uses less digits than its factorization.

20346642331556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11592 (or 11590 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 50.

Adding to 20346642331556 its reverse (65513324664302), we get a palindrome (85859966995858).

The spelling of 20346642331556 in words is "twenty trillion, three hundred forty-six billion, six hundred forty-two million, three hundred thirty-one thousand, five hundred fifty-six".