20554120314251 has 4 divisors (see below), whose sum is σ = 20590117022904. Its totient is φ = 20518123605600.

The previous prime is 20554120314187. The next prime is 20554120314269. The reversal of 20554120314251 is 15241302145502.

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 20554120314251 - 2⁶ = 20554120314187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20554120314281) 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, 17998353470 + ... + 17998354611.

It is an arithmetic number, because the mean of its divisors is an integer number (5147529255726).

Almost surely, 2^{20554120314251} is an apocalyptic number.

20554120314251 is a deficient number, since it is larger than the sum of its proper divisors (35996708653).

20554120314251 is an equidigital number, since it uses as much as digits as its factorization.

20554120314251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35996708652.

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 20554120314251 its reverse (15241302145502), we get a palindrome (35795422459753).

The spelling of 20554120314251 in words is "twenty trillion, five hundred fifty-four billion, one hundred twenty million, three hundred fourteen thousand, two hundred fifty-one".