20310144615553 has 8 divisors (see below), whose sum is σ = 21872760412608. Its totient is φ = 18747571244304.

The previous prime is 20310144615511. The next prime is 20310144615587. The reversal of 20310144615553 is 35551644101302.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20310144615553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20310144115553) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9608701 + ... + 11530282.

It is an arithmetic number, because the mean of its divisors is an integer number (2734095051576).

Almost surely, 2^{20310144615553} is an apocalyptic number.

It is an amenable number.

20310144615553 is a deficient number, since it is larger than the sum of its proper divisors (1562615797055).

20310144615553 is a wasteful number, since it uses less digits than its factorization.

20310144615553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21212903.

The product of its (nonzero) digits is 216000, while the sum is 40.

Adding to 20310144615553 its reverse (35551644101302), we get a palindrome (55861788716855).

The spelling of 20310144615553 in words is "twenty trillion, three hundred ten billion, one hundred forty-four million, six hundred fifteen thousand, five hundred fifty-three".