13990305646 has 4 divisors (see below), whose sum is σ = 20985458472. Its totient is φ = 6995152822.

The previous prime is 13990305607. The next prime is 13990305691. The reversal of 13990305646 is 64650309931.

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 = 13990305596 and 13990305605.

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, 3497576410 + ... + 3497576413.

It is an arithmetic number, because the mean of its divisors is an integer number (5246364618).

Almost surely, 2^13990305646 is an apocalyptic number.

13990305646 is a deficient number, since it is larger than the sum of its proper divisors (6995152826).

13990305646 is an equidigital number, since it uses as much as digits as its factorization.

13990305646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6995152825.

The product of its (nonzero) digits is 524880, while the sum is 46.

The spelling of 13990305646 in words is "thirteen billion, nine hundred ninety million, three hundred five thousand, six hundred forty-six".