20155020682 has 4 divisors (see below), whose sum is σ = 30232531026. Its totient is φ = 10077510340.

The previous prime is 20155020661. The next prime is 20155020707. The reversal of 20155020682 is 28602055102.

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., 12791836201 + 7363184481 = 113101^2 + 85809^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5038755169 + ... + 5038755172.

Almost surely, 2^20155020682 is an apocalyptic number.

20155020682 is a deficient number, since it is larger than the sum of its proper divisors (10077510344).

20155020682 is a wasteful number, since it uses less digits than its factorization.

20155020682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10077510343.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 20155020682 its reverse (28602055102), we get a palindrome (48757075784).

The spelling of 20155020682 in words is "twenty billion, one hundred fifty-five million, twenty thousand, six hundred eighty-two".