20554363005251 has 4 divisors (see below), whose sum is σ = 20554372881600. Its totient is φ = 20554353128904.

The previous prime is 20554363005203. The next prime is 20554363005257. The reversal of 20554363005251 is 15250036345502.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20554363005251 - 2⁴² = 16156316494147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20554363005199 and 20554363005208.

It is not an unprimeable number, because it can be changed into a prime (20554363005257) 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, 466931 + ... + 6428588.

It is an arithmetic number, because the mean of its divisors is an integer number (5138593220400).

Almost surely, 2^{20554363005251} is an apocalyptic number.

20554363005251 is a deficient number, since it is larger than the sum of its proper divisors (9876349).

20554363005251 is an equidigital number, since it uses as much as digits as its factorization.

20554363005251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9876348.

The product of its (nonzero) digits is 540000, while the sum is 41.

The spelling of 20554363005251 in words is "twenty trillion, five hundred fifty-four billion, three hundred sixty-three million, five thousand, two hundred fifty-one".