18943624081828 has 48 divisors (see below), whose sum is σ = 35101530112320. Its totient is φ = 8920494347904.

The previous prime is 18943624081799. The next prime is 18943624081829. The reversal of 18943624081828 is 82818042634981.

It is a super-2 number, since 2×18943624081828² (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 18943624081828.

It is not an unprimeable number, because it can be changed into a prime (18943624081829) 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, 134920350 + ... + 135060682.

It is an arithmetic number, because the mean of its divisors is an integer number (731281877340).

Almost surely, 2^{18943624081828} is an apocalyptic number.

It is an amenable number.

18943624081828 is a deficient number, since it is larger than the sum of its proper divisors (16157906030492).

18943624081828 is a wasteful number, since it uses less digits than its factorization.

18943624081828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150796 (or 150794 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 64.

The spelling of 18943624081828 in words is "eighteen trillion, nine hundred forty-three billion, six hundred twenty-four million, eighty-one thousand, eight hundred twenty-eight".