20005351885 has 16 divisors (see below), whose sum is σ = 25424395776. Its totient is φ = 15059397888.

The previous prime is 20005351853. The next prime is 20005351897. The reversal of 20005351885 is 58815350002.

It is a cyclic number.

It is not a de Polignac number, because 20005351885 - 2⁵ = 20005351853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381952 + ... + 431158.

It is an arithmetic number, because the mean of its divisors is an integer number (1589024736).

Almost surely, 2^20005351885 is an apocalyptic number.

It is an amenable number.

20005351885 is a deficient number, since it is larger than the sum of its proper divisors (5419043891).

20005351885 is a wasteful number, since it uses less digits than its factorization.

20005351885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54012.

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 20005351885 in words is "twenty billion, five million, three hundred fifty-one thousand, eight hundred eighty-five".