18419653966 has 32 divisors (see below), whose sum is σ = 33054289920. Its totient is φ = 7531876800.

The previous prime is 18419653963. The next prime is 18419653979. The reversal of 18419653966 is 66935691481.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18419653966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18419653963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268071 + ... + 329698.

It is an arithmetic number, because the mean of its divisors is an integer number (1032946560).

Almost surely, 2^18419653966 is an apocalyptic number.

18419653966 is a deficient number, since it is larger than the sum of its proper divisors (14634635954).

18419653966 is a wasteful number, since it uses less digits than its factorization.

18419653966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597880.

The product of its digits is 8398080, while the sum is 58.

The spelling of 18419653966 in words is "eighteen billion, four hundred nineteen million, six hundred fifty-three thousand, nine hundred sixty-six".