20180535855 has 16 divisors (see below), whose sum is σ = 32321929824. Its totient is φ = 10751928320.

The previous prime is 20180535847. The next prime is 20180535929. The reversal of 20180535855 is 55853508102.

It is not a de Polignac number, because 20180535855 - 2³ = 20180535847 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673866 + ... + 703175.

It is an arithmetic number, because the mean of its divisors is an integer number (2020120614).

Almost surely, 2^20180535855 is an apocalyptic number.

20180535855 is a deficient number, since it is larger than the sum of its proper divisors (12141393969).

20180535855 is a wasteful number, since it uses less digits than its factorization.

20180535855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378026.

The product of its (nonzero) digits is 240000, while the sum is 42.

The spelling of 20180535855 in words is "twenty billion, one hundred eighty million, five hundred thirty-five thousand, eight hundred fifty-five".