20463145642 has 8 divisors (see below), whose sum is σ = 30695890500. Its totient is φ = 10231182144.

The previous prime is 20463145631. The next prime is 20463145657. The reversal of 20463145642 is 24654136402.

It can be written as a sum of positive squares in 2 ways, for example, as 17718538321 + 2744607321 = 133111^2 + 52389^2 .

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

It is an unprimeable number.

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, 124767 + ... + 237682.

Almost surely, 2^20463145642 is an apocalyptic number.

20463145642 is a deficient number, since it is larger than the sum of its proper divisors (10232744858).

20463145642 is a wasteful number, since it uses less digits than its factorization.

20463145642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390680.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 20463145642 in words is "twenty billion, four hundred sixty-three million, one hundred forty-five thousand, six hundred forty-two".