20102105558 has 16 divisors (see below), whose sum is σ = 31129517184. Its totient is φ = 9725676480.

The previous prime is 20102105509. The next prime is 20102105591. The reversal of 20102105558 is 85550120102.

It is a super-3 number, since 3×20102105558³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20102105558.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 770666 + ... + 796322.

It is an arithmetic number, because the mean of its divisors is an integer number (1945594824).

Almost surely, 2^20102105558 is an apocalyptic number.

20102105558 is a deficient number, since it is larger than the sum of its proper divisors (11027411626).

20102105558 is a wasteful number, since it uses less digits than its factorization.

20102105558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38327.

The product of its (nonzero) digits is 4000, while the sum is 29.

The spelling of 20102105558 in words is "twenty billion, one hundred two million, one hundred five thousand, five hundred fifty-eight".