20310510556553 has 16 divisors (see below), whose sum is σ = 23217702790656. Its totient is φ = 17404741589760.

The previous prime is 20310510556543. The next prime is 20310510556597. The reversal of 20310510556553 is 35565501501302.

It is not a de Polignac number, because 20310510556553 - 2¹⁶ = 20310510491017 is a prime.

It is a super-2 number, since 2×20310510556553² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20310510556553.

It is not an unprimeable number, because it can be changed into a prime (20310510556543) 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, 811336925 + ... + 811361957.

It is an arithmetic number, because the mean of its divisors is an integer number (1451106424416).

Almost surely, 2^{20310510556553} is an apocalyptic number.

It is an amenable number.

20310510556553 is a deficient number, since it is larger than the sum of its proper divisors (2907192234103).

20310510556553 is a wasteful number, since it uses less digits than its factorization.

20310510556553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48824.

The product of its (nonzero) digits is 337500, while the sum is 41.

The spelling of 20310510556553 in words is "twenty trillion, three hundred ten billion, five hundred ten million, five hundred fifty-six thousand, five hundred fifty-three".