20364746354640 has 120 divisors (see below), whose sum is σ = 68404574684160. Its totient is φ = 5429569297152.

The previous prime is 20364746354599. The next prime is 20364746354647. The reversal of 20364746354640 is 4645364746302.

20364746354640 is a `hidden beast` number, since 2 + 0 + 3 + 6 + 474 + 63 + 54 + 64 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-3 number, since 3×20364746354640³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20364746354647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1121929 + ... + 6479831.

It is an arithmetic number, because the mean of its divisors is an integer number (570038122368).

Almost surely, 2^{20364746354640} is an apocalyptic number.

20364746354640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20364746354640 is an abundant number, since it is smaller than the sum of its proper divisors (48039828329520).

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

20364746354640 is a wasteful number, since it uses less digits than its factorization.

20364746354640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5363201 (or 5363192 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 54.

The spelling of 20364746354640 in words is "twenty trillion, three hundred sixty-four billion, seven hundred forty-six million, three hundred fifty-four thousand, six hundred forty".