20500056146 has 4 divisors (see below), whose sum is σ = 30750084222. Its totient is φ = 10250028072.

The previous prime is 20500056107. The next prime is 20500056173. The reversal of 20500056146 is 64165000502.

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., 11698801921 + 8801254225 = 108161^2 + 93815^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5125014035 + ... + 5125014038.

Almost surely, 2^20500056146 is an apocalyptic number.

20500056146 is a deficient number, since it is larger than the sum of its proper divisors (10250028076).

20500056146 is a wasteful number, since it uses less digits than its factorization.

20500056146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10250028075.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 20500056146 its reverse (64165000502), we get a palindrome (84665056648).

The spelling of 20500056146 in words is "twenty billion, five hundred million, fifty-six thousand, one hundred forty-six".