20102105154 has 16 divisors (see below), whose sum is σ = 40688599392. Its totient is φ = 6619970208.

The previous prime is 20102105117. The next prime is 20102105197. The reversal of 20102105154 is 45150120102.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20102105154.

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, 20182339 + ... + 20183334.

It is an arithmetic number, because the mean of its divisors is an integer number (2543037462).

Almost surely, 2^20102105154 is an apocalyptic number.

20102105154 is an abundant number, since it is smaller than the sum of its proper divisors (20586494238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20102105154 is a wasteful number, since it uses less digits than its factorization.

20102105154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40365761.

The product of its (nonzero) digits is 400, while the sum is 21.

Adding to 20102105154 its reverse (45150120102), we get a palindrome (65252225256).

The spelling of 20102105154 in words is "twenty billion, one hundred two million, one hundred five thousand, one hundred fifty-four".