20031488887 has 4 divisors (see below), whose sum is σ = 20031991840. Its totient is φ = 20030985936.

The previous prime is 20031488881. The next prime is 20031488903. The reversal of 20031488887 is 78888413002.

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 20031488887 - 2¹⁹ = 20030964599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20031488887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20031488881) 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 3 ways as a sum of consecutive naturals, for example, 186063 + ... + 273280.

It is an arithmetic number, because the mean of its divisors is an integer number (5007997960).

Almost surely, 2^20031488887 is an apocalyptic number.

20031488887 is a deficient number, since it is larger than the sum of its proper divisors (502953).

20031488887 is an equidigital number, since it uses as much as digits as its factorization.

20031488887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502952.

The product of its (nonzero) digits is 688128, while the sum is 49.

The spelling of 20031488887 in words is "twenty billion, thirty-one million, four hundred eighty-eight thousand, eight hundred eighty-seven".