20132818487 has 4 divisors (see below), whose sum is σ = 20133108120. Its totient is φ = 20132528856.

The previous prime is 20132818469. The next prime is 20132818499. The reversal of 20132818487 is 78481823102.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 20132818487 - 2¹⁸ = 20132556343 is a prime.

It is a deceptive number, since it divides R_20132818486.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132818687) 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, 28964 + ... + 202742.

It is an arithmetic number, because the mean of its divisors is an integer number (5033277030).

Almost surely, 2^20132818487 is an apocalyptic number.

20132818487 is the 115853-rd pentagonal number.

20132818487 is a deficient number, since it is larger than the sum of its proper divisors (289633).

20132818487 is a wasteful number, since it uses less digits than its factorization.

20132818487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289632.

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 20132818487 in words is "twenty billion, one hundred thirty-two million, eight hundred eighteen thousand, four hundred eighty-seven".