18709215746 has 16 divisors (see below), whose sum is σ = 30224846400. Its totient is φ = 8634374928.

The previous prime is 18709215737. The next prime is 18709215757. The reversal of 18709215746 is 64751290781.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18709215694 and 18709215703.

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 7 ways as a sum of consecutive naturals, for example, 609515 + ... + 639473.

It is an arithmetic number, because the mean of its divisors is an integer number (1889052900).

Almost surely, 2^18709215746 is an apocalyptic number.

18709215746 is a deficient number, since it is larger than the sum of its proper divisors (11515630654).

18709215746 is a wasteful number, since it uses less digits than its factorization.

18709215746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53993.

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 18709215746 in words is "eighteen billion, seven hundred nine million, two hundred fifteen thousand, seven hundred forty-six".