20510054633553 has 4 divisors (see below), whose sum is σ = 27346739511408. Its totient is φ = 13673369755700.

The previous prime is 20510054633491. The next prime is 20510054633581. The reversal of 20510054633553 is 35533645001502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20510054633553 - 2⁸ = 20510054633297 is a prime.

It is a super-2 number, since 2×20510054633553² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20510054633353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3418342438923 + ... + 3418342438928.

It is an arithmetic number, because the mean of its divisors is an integer number (6836684877852).

Almost surely, 2^{20510054633553} is an apocalyptic number.

It is an amenable number.

20510054633553 is a deficient number, since it is larger than the sum of its proper divisors (6836684877855).

20510054633553 is an equidigital number, since it uses as much as digits as its factorization.

20510054633553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6836684877854.

The product of its (nonzero) digits is 810000, while the sum is 42.

The spelling of 20510054633553 in words is "twenty trillion, five hundred ten billion, fifty-four million, six hundred thirty-three thousand, five hundred fifty-three".