18720146525366 has 64 divisors (see below), whose sum is σ = 33556744488960. Its totient is φ = 7719578319360.

The previous prime is 18720146525351. The next prime is 18720146525371. The reversal of 18720146525366 is 66352564102781.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69504590 + ... + 69773406.

It is an arithmetic number, because the mean of its divisors is an integer number (524324132640).

Almost surely, 2^{18720146525366} is an apocalyptic number.

18720146525366 is a deficient number, since it is larger than the sum of its proper divisors (14836597963594).

18720146525366 is a wasteful number, since it uses less digits than its factorization.

18720146525366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273029.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 18720146525366 in words is "eighteen trillion, seven hundred twenty billion, one hundred forty-six million, five hundred twenty-five thousand, three hundred sixty-six".