20006174887 has 6 divisors (see below), whose sum is σ = 21114550608. Its totient is φ = 18953217972.

The previous prime is 20006174869. The next prime is 20006174897. The reversal of 20006174887 is 78847160002.

It is not a de Polignac number, because 20006174887 - 2⁷ = 20006174759 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 (20006174807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27709023 + ... + 27709744.

It is an arithmetic number, because the mean of its divisors is an integer number (3519091768).

Almost surely, 2^20006174887 is an apocalyptic number.

20006174887 is a deficient number, since it is larger than the sum of its proper divisors (1108375721).

20006174887 is an equidigital number, since it uses as much as digits as its factorization.

20006174887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55418805 (or 55418786 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 43.

The spelling of 20006174887 in words is "twenty billion, six million, one hundred seventy-four thousand, eight hundred eighty-seven".