20105514205 has 16 divisors (see below), whose sum is σ = 27590302080. Its totient is φ = 13778125632.

The previous prime is 20105514199. The next prime is 20105514211. The reversal of 20105514205 is 50241550102.

It is an interprime number because it is at equal distance from previous prime (20105514199) and next prime (20105514211).

It is a cyclic number.

It is not a de Polignac number, because 20105514205 - 2¹⁹ = 20104989917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20105514205.

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 15 ways as a sum of consecutive naturals, for example, 119590 + ... + 233479.

It is an arithmetic number, because the mean of its divisors is an integer number (1724393880).

Almost surely, 2^20105514205 is an apocalyptic number.

It is an amenable number.

20105514205 is a deficient number, since it is larger than the sum of its proper divisors (7484787875).

20105514205 is a wasteful number, since it uses less digits than its factorization.

20105514205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354708.

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 20105514205 in words is "twenty billion, one hundred five million, five hundred fourteen thousand, two hundred five".