20000505387 has 8 divisors (see below), whose sum is σ = 26768738304. Its totient is φ = 13282971368.

The previous prime is 20000505379. The next prime is 20000505391. The reversal of 20000505387 is 78350500002.

It is a happy number.

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 20000505387 - 2³ = 20000505379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20000505367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12673803 + ... + 12675380.

It is an arithmetic number, because the mean of its divisors is an integer number (3346092288).

Almost surely, 2^20000505387 is an apocalyptic number.

20000505387 is a deficient number, since it is larger than the sum of its proper divisors (6768232917).

20000505387 is a wasteful number, since it uses less digits than its factorization.

20000505387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25349449.

The product of its (nonzero) digits is 8400, while the sum is 30.

The spelling of 20000505387 in words is "twenty billion, five hundred five thousand, three hundred eighty-seven".