18935646297040 has 40 divisors (see below), whose sum is σ = 48027684701088. Its totient is φ = 6885689562240.

The previous prime is 18935646296999. The next prime is 18935646297067. The reversal of 18935646297040 is 4079264653981.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×18935646297040³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10758889062 + ... + 10758890821.

It is a 1-persistent number, because it is pandigital, but 2⋅18935646297040 = 37871292594080 is not.

Almost surely, 2^{18935646297040} is an apocalyptic number.

18935646297040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18935646297040 is an abundant number, since it is smaller than the sum of its proper divisors (29092038404048).

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

18935646297040 is a wasteful number, since it uses less digits than its factorization.

18935646297040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21517779907 (or 21517779901 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 64.

The spelling of 18935646297040 in words is "eighteen trillion, nine hundred thirty-five billion, six hundred forty-six million, two hundred ninety-seven thousand, forty".