20346642402446 has 8 divisors (see below), whose sum is σ = 30906292257120. Its totient is φ = 10044544983408.

The previous prime is 20346642402337. The next prime is 20346642402469. The reversal of 20346642402446 is 64420424664302.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20346642402446.

It is a congruent number.

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, 64388108711 + ... + 64388109026.

It is an arithmetic number, because the mean of its divisors is an integer number (3863286532140).

Almost surely, 2^{20346642402446} is an apocalyptic number.

20346642402446 is a deficient number, since it is larger than the sum of its proper divisors (10559649854674).

20346642402446 is a wasteful number, since it uses less digits than its factorization.

20346642402446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128776217818.

The product of its (nonzero) digits is 5308416, while the sum is 47.

The spelling of 20346642402446 in words is "twenty trillion, three hundred forty-six billion, six hundred forty-two million, four hundred two thousand, four hundred forty-six".