20554422454015 has 4 divisors (see below), whose sum is σ = 24665306944824. Its totient is φ = 16443537963208.

The previous prime is 20554422453997. The next prime is 20554422454031. The reversal of 20554422454015 is 51045422445502.

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 20554422454015 - 2²⁹ = 20553885583103 is a prime.

It is a super-3 number, since 3×20554422454015³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2055442245397 + ... + 2055442245406.

It is an arithmetic number, because the mean of its divisors is an integer number (6166326736206).

Almost surely, 2^{20554422454015} is an apocalyptic number.

20554422454015 is a deficient number, since it is larger than the sum of its proper divisors (4110884490809).

20554422454015 is an equidigital number, since it uses as much as digits as its factorization.

20554422454015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4110884490808.

The product of its (nonzero) digits is 1280000, while the sum is 43.

Adding to 20554422454015 its reverse (51045422445502), we get a palindrome (71599844899517).

The spelling of 20554422454015 in words is "twenty trillion, five hundred fifty-four billion, four hundred twenty-two million, four hundred fifty-four thousand, fifteen".