20102146 has 4 divisors (see below), whose sum is σ = 30153222. Its totient is φ = 10051072.

The previous prime is 20102129. The next prime is 20102153. The reversal of 20102146 is 64120102.

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

It can be written as a sum of positive squares in only one way, i.e., 18156121 + 1946025 = 4261^2 + 1395^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025535 + ... + 5025538.

Almost surely, 2^20102146 is an apocalyptic number.

20102146 is a deficient number, since it is larger than the sum of its proper divisors (10051076).

20102146 is a wasteful number, since it uses less digits than its factorization.

20102146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051075.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 20102146 is about 4483.5416804129. The cubic root of 20102146 is about 271.9030886732.

Adding to 20102146 its reverse (64120102), we get a palindrome (84222248).

The spelling of 20102146 in words is "twenty million, one hundred two thousand, one hundred forty-six".