20054791345 has 4 divisors (see below), whose sum is σ = 24065749620. Its totient is φ = 16043833072.

The previous prime is 20054791297. The next prime is 20054791349. The reversal of 20054791345 is 54319745002.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10859515681 + 9195275664 = 104209^2 + 95892^2 .

It is a cyclic number.

It is not a de Polignac number, because 20054791345 - 2¹³ = 20054783153 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20054791298 and 20054791307.

It is not an unprimeable number, because it can be changed into a prime (20054791349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2005479130 + ... + 2005479139.

It is an arithmetic number, because the mean of its divisors is an integer number (6016437405).

Almost surely, 2^20054791345 is an apocalyptic number.

It is an amenable number.

20054791345 is a deficient number, since it is larger than the sum of its proper divisors (4010958275).

20054791345 is an equidigital number, since it uses as much as digits as its factorization.

20054791345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010958274.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 20054791345 in words is "twenty billion, fifty-four million, seven hundred ninety-one thousand, three hundred forty-five".