20354005555 has 16 divisors (see below), whose sum is σ = 26749467360. Its totient is φ = 14775890688.

The previous prime is 20354005547. The next prime is 20354005561. The reversal of 20354005555 is 55550045302.

It is not a de Polignac number, because 20354005555 - 2³ = 20354005547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20354005555.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 2649882 + ... + 2657551.

It is an arithmetic number, because the mean of its divisors is an integer number (1671841710).

Almost surely, 2^20354005555 is an apocalyptic number.

20354005555 is a deficient number, since it is larger than the sum of its proper divisors (6395461805).

20354005555 is a wasteful number, since it uses less digits than its factorization.

20354005555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5307510.

The product of its (nonzero) digits is 75000, while the sum is 34.

The spelling of 20354005555 in words is "twenty billion, three hundred fifty-four million, five thousand, five hundred fifty-five".