20517677342 has 4 divisors (see below), whose sum is σ = 30776516016. Its totient is φ = 10258838670.

The previous prime is 20517677317. The next prime is 20517677363. The reversal of 20517677342 is 24377671502.

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

It is a junction number, because it is equal to n+sod(n) for n = 20517677293 and 20517677302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5129419334 + ... + 5129419337.

It is an arithmetic number, because the mean of its divisors is an integer number (7694129004).

Almost surely, 2^20517677342 is an apocalyptic number.

20517677342 is a deficient number, since it is larger than the sum of its proper divisors (10258838674).

20517677342 is a wasteful number, since it uses less digits than its factorization.

20517677342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10258838673.

The product of its (nonzero) digits is 493920, while the sum is 44.

The spelling of 20517677342 in words is "twenty billion, five hundred seventeen million, six hundred seventy-seven thousand, three hundred forty-two".