20115535555 has 8 divisors (see below), whose sum is σ = 24147277344. Its totient is φ = 16086672000.

The previous prime is 20115535547. The next prime is 20115535591. The reversal of 20115535555 is 55553551102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20115535555 - 2³ = 20115535547 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 704151 + ... + 732160.

It is an arithmetic number, because the mean of its divisors is an integer number (3018409668).

Almost surely, 2^20115535555 is an apocalyptic number.

20115535555 is a deficient number, since it is larger than the sum of its proper divisors (4031741789).

20115535555 is a wasteful number, since it uses less digits than its factorization.

20115535555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439117.

The product of its (nonzero) digits is 93750, while the sum is 37.

The spelling of 20115535555 in words is "twenty billion, one hundred fifteen million, five hundred thirty-five thousand, five hundred fifty-five".