20662142146 has 8 divisors (see below), whose sum is σ = 30994939404. Its totient is φ = 10330495680.

The previous prime is 20662142087. The next prime is 20662142147. The reversal of 20662142146 is 64124126602.

It can be written as a sum of positive squares in 2 ways, for example, as 19108915225 + 1553226921 = 138235^2 + 39411^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20662142147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241315 + ... + 315526.

Almost surely, 2^20662142146 is an apocalyptic number.

20662142146 is a deficient number, since it is larger than the sum of its proper divisors (10332797258).

20662142146 is a wasteful number, since it uses less digits than its factorization.

20662142146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575396.

The product of its (nonzero) digits is 27648, while the sum is 34.

Adding to 20662142146 its reverse (64124126602), we get a palindrome (84786268748).

The spelling of 20662142146 in words is "twenty billion, six hundred sixty-two million, one hundred forty-two thousand, one hundred forty-six".