18943624064774 has 8 divisors (see below), whose sum is σ = 28415506669488. Its totient is φ = 9471788508280.

The previous prime is 18943624064773. The next prime is 18943624064789. The reversal of 18943624064774 is 47746042634981.

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

It is a super-2 number, since 2×18943624064774² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18943624064774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18943624064773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10737602 + ... + 12376725.

It is an arithmetic number, because the mean of its divisors is an integer number (3551938333686).

Almost surely, 2^{18943624064774} is an apocalyptic number.

18943624064774 is a deficient number, since it is larger than the sum of its proper divisors (9471882604714).

18943624064774 is a wasteful number, since it uses less digits than its factorization.

18943624064774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23524110.

The product of its (nonzero) digits is 195084288, while the sum is 65.

The spelling of 18943624064774 in words is "eighteen trillion, nine hundred forty-three billion, six hundred twenty-four million, sixty-four thousand, seven hundred seventy-four".