20135364344640 has 168 divisors, whose sum is σ = 72268449222528. Its totient is φ = 5135976975360.

The previous prime is 20135364344633. The next prime is 20135364344653. The reversal of 20135364344640 is 4644346353102.

It is a happy number.

20135364344640 is a `hidden beast` number, since 2 + 0 + 1 + 3 + 536 + 4 + 34 + 46 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 151921716 + ... + 152054195.

Almost surely, 2^{20135364344640} is an apocalyptic number.

20135364344640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20135364344640 is an abundant number, since it is smaller than the sum of its proper divisors (52133084877888).

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

20135364344640 is a wasteful number, since it uses less digits than its factorization.

20135364344640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303975957 (or 303975944 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 45.

The spelling of 20135364344640 in words is "twenty trillion, one hundred thirty-five billion, three hundred sixty-four million, three hundred forty-four thousand, six hundred forty".