18750221947133 has 16 divisors (see below), whose sum is σ = 18853400529600. Its totient is φ = 18647353751040.

The previous prime is 18750221947081. The next prime is 18750221947151. The reversal of 18750221947133 is 33174912205781.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18750221947133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18750221941133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 579535085 + ... + 579567437.

It is an arithmetic number, because the mean of its divisors is an integer number (1178337533100).

Almost surely, 2^{18750221947133} is an apocalyptic number.

It is an amenable number.

18750221947133 is a deficient number, since it is larger than the sum of its proper divisors (103178582467).

18750221947133 is a wasteful number, since it uses less digits than its factorization.

18750221947133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37052.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 18750221947133 in words is "eighteen trillion, seven hundred fifty billion, two hundred twenty-one million, nine hundred forty-seven thousand, one hundred thirty-three".