20182738291 has 4 divisors (see below), whose sum is σ = 20459214232. Its totient is φ = 19906262352.

The previous prime is 20182738259. The next prime is 20182738313. The reversal of 20182738291 is 19283728102.

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 20182738291 - 2⁵ = 20182738259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20182738241) 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, 138237861 + ... + 138238006.

It is an arithmetic number, because the mean of its divisors is an integer number (5114803558).

Almost surely, 2^20182738291 is an apocalyptic number.

20182738291 is a deficient number, since it is larger than the sum of its proper divisors (276475941).

20182738291 is an equidigital number, since it uses as much as digits as its factorization.

20182738291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276475940.

The product of its (nonzero) digits is 96768, while the sum is 43.

The spelling of 20182738291 in words is "twenty billion, one hundred eighty-two million, seven hundred thirty-eight thousand, two hundred ninety-one".