20554513531351 has 4 divisors (see below), whose sum is σ = 20573422928512. Its totient is φ = 20535604134192.

The previous prime is 20554513531337. The next prime is 20554513531379. The reversal of 20554513531351 is 15313531545502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20554513531351 - 2⁵ = 20554513531319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20554513531298 and 20554513531307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554513534351) by changing a digit.

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, 9454696950 + ... + 9454699123.

It is an arithmetic number, because the mean of its divisors is an integer number (5143355732128).

Almost surely, 2^{20554513531351} is an apocalyptic number.

20554513531351 is a deficient number, since it is larger than the sum of its proper divisors (18909397161).

20554513531351 is a wasteful number, since it uses less digits than its factorization.

20554513531351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18909397160.

The product of its (nonzero) digits is 675000, while the sum is 43.

The spelling of 20554513531351 in words is "twenty trillion, five hundred fifty-four billion, five hundred thirteen million, five hundred thirty-one thousand, three hundred fifty-one".