20201002105 has 4 divisors (see below), whose sum is σ = 24241202532. Its totient is φ = 16160801680.

The previous prime is 20201002057. The next prime is 20201002117. The reversal of 20201002105 is 50120010202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11705508864 + 8495493241 = 108192^2 + 92171^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20201002105 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020100206 + ... + 2020100215.

It is an arithmetic number, because the mean of its divisors is an integer number (6060300633).

Almost surely, 2^20201002105 is an apocalyptic number.

It is an amenable number.

20201002105 is a deficient number, since it is larger than the sum of its proper divisors (4040200427).

20201002105 is an equidigital number, since it uses as much as digits as its factorization.

20201002105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040200426.

The product of its (nonzero) digits is 40, while the sum is 13.

Adding to 20201002105 its reverse (50120010202), we get a palindrome (70321012307).

The spelling of 20201002105 in words is "twenty billion, two hundred one million, two thousand, one hundred five".