20487358823 has 16 divisors (see below), whose sum is σ = 20936262336. Its totient is φ = 20043417600.

The previous prime is 20487358819. The next prime is 20487358831. The reversal of 20487358823 is 32885378402.

It is a cyclic number.

It is not a de Polignac number, because 20487358823 - 2² = 20487358819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487358883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14296115 + ... + 14297547.

It is an arithmetic number, because the mean of its divisors is an integer number (1308516396).

Almost surely, 2^20487358823 is an apocalyptic number.

20487358823 is a deficient number, since it is larger than the sum of its proper divisors (448903513).

20487358823 is a wasteful number, since it uses less digits than its factorization.

20487358823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954.

The product of its (nonzero) digits is 2580480, while the sum is 50.

The spelling of 20487358823 in words is "twenty billion, four hundred eighty-seven million, three hundred fifty-eight thousand, eight hundred twenty-three".