20474331542261 has 8 divisors (see below), whose sum is σ = 21168817308600. Its totient is φ = 19787273431488.

The previous prime is 20474331542243. The next prime is 20474331542309. The reversal of 20474331542261 is 16224513347402.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 95372880625 + 20378958661636 = 308825^2 + 4514306^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20474331542261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20474331542201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1856908286 + ... + 1856919311.

It is an arithmetic number, because the mean of its divisors is an integer number (2646102163575).

Almost surely, 2^{20474331542261} is an apocalyptic number.

It is an amenable number.

20474331542261 is a deficient number, since it is larger than the sum of its proper divisors (694485766339).

20474331542261 is a wasteful number, since it uses less digits than its factorization.

20474331542261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713827783.

The product of its (nonzero) digits is 967680, while the sum is 44.

Adding to 20474331542261 its reverse (16224513347402), we get a palindrome (36698844889663).

The spelling of 20474331542261 in words is "twenty trillion, four hundred seventy-four billion, three hundred thirty-one million, five hundred forty-two thousand, two hundred sixty-one".