20410774831 has 4 divisors (see below), whose sum is σ = 20962417432. Its totient is φ = 19859132232.

The previous prime is 20410774817. The next prime is 20410774841. The reversal of 20410774831 is 13847701402.

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 20410774831 - 2⁵ = 20410774799 is a prime.

It is a super-2 number, since 2×20410774831² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 551642563 = 20410774831 / (2 + 0 + 4 + 1 + 0 + 7 + 7 + 4 + 8 + 3 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20410774841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275821245 + ... + 275821318.

It is an arithmetic number, because the mean of its divisors is an integer number (5240604358).

Almost surely, 2^20410774831 is an apocalyptic number.

20410774831 is a deficient number, since it is larger than the sum of its proper divisors (551642601).

20410774831 is an equidigital number, since it uses as much as digits as its factorization.

20410774831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551642600.

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 20410774831 in words is "twenty billion, four hundred ten million, seven hundred seventy-four thousand, eight hundred thirty-one".