20474041542257 has 4 divisors (see below), whose sum is σ = 21551622676080. Its totient is φ = 19396460408436.

The previous prime is 20474041542209. The next prime is 20474041542259. The reversal of 20474041542257 is 75224514047402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20474041542257 - 2⁸ = 20474041542001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20474041542259) 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, 538790566883 + ... + 538790566920.

It is an arithmetic number, because the mean of its divisors is an integer number (5387905669020).

Almost surely, 2^{20474041542257} is an apocalyptic number.

It is an amenable number.

20474041542257 is a deficient number, since it is larger than the sum of its proper divisors (1077581133823).

20474041542257 is a wasteful number, since it uses less digits than its factorization.

20474041542257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077581133822.

The product of its (nonzero) digits is 2508800, while the sum is 47.

Adding to 20474041542257 its reverse (75224514047402), we get a palindrome (95698555589659).

The spelling of 20474041542257 in words is "twenty trillion, four hundred seventy-four billion, forty-one million, five hundred forty-two thousand, two hundred fifty-seven".