20488174765 has 8 divisors (see below), whose sum is σ = 25433596440. Its totient is φ = 15825348672.

The previous prime is 20488174709. The next prime is 20488174781. The reversal of 20488174765 is 56747188402.

It can be written as a sum of positive squares in 4 ways, for example, as 22297284 + 20465877481 = 4722^2 + 143059^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20488174765 - 2¹¹ = 20488172717 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 70648734 + ... + 70649023.

It is an arithmetic number, because the mean of its divisors is an integer number (3179199555).

Almost surely, 2^20488174765 is an apocalyptic number.

It is an amenable number.

20488174765 is a deficient number, since it is larger than the sum of its proper divisors (4945421675).

20488174765 is a wasteful number, since it uses less digits than its factorization.

20488174765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141297791.

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 20488174765 in words is "twenty billion, four hundred eighty-eight million, one hundred seventy-four thousand, seven hundred sixty-five".