18720232233474 has 8 divisors (see below), whose sum is σ = 37440464466960. Its totient is φ = 6240077411156.

The previous prime is 18720232233473. The next prime is 18720232233491. The reversal of 18720232233474 is 47433223202781.

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

18720232233474 is an admirable number.

It is a super-2 number, since 2×18720232233474² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18720232233473) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1560019352784 + ... + 1560019352795.

It is an arithmetic number, because the mean of its divisors is an integer number (4680058058370).

Almost surely, 2^{18720232233474} is an apocalyptic number.

18720232233474 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18720232233474 is a wasteful number, since it uses less digits than its factorization.

18720232233474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120038705584.

The product of its (nonzero) digits is 2709504, while the sum is 48.

The spelling of 18720232233474 in words is "eighteen trillion, seven hundred twenty billion, two hundred thirty-two million, two hundred thirty-three thousand, four hundred seventy-four".