20401544160506 has 8 divisors (see below), whose sum is σ = 30649909269504. Its totient is φ = 10184907737340.

The previous prime is 20401544160457. The next prime is 20401544160553. The reversal of 20401544160506 is 60506144510402.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20401544160506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7932169850 + ... + 7932172421.

It is an arithmetic number, because the mean of its divisors is an integer number (3831238658688).

Almost surely, 2^{20401544160506} is an apocalyptic number.

20401544160506 is a deficient number, since it is larger than the sum of its proper divisors (10248365108998).

20401544160506 is a wasteful number, since it uses less digits than its factorization.

20401544160506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15864342916.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 20401544160506 its reverse (60506144510402), we get a palindrome (80907688670908).

The spelling of 20401544160506 in words is "twenty trillion, four hundred one billion, five hundred forty-four million, one hundred sixty thousand, five hundred six".