20346436365640 has 128 divisors (see below), whose sum is σ = 57077652222720. Its totient is φ = 6341531443200.

The previous prime is 20346436365631. The next prime is 20346436365641. The reversal of 20346436365640 is 4656363464302.

It is not an unprimeable number, because it can be changed into a prime (20346436365641) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 107585404 + ... + 107774356.

It is an arithmetic number, because the mean of its divisors is an integer number (445919157990).

Almost surely, 2^{20346436365640} is an apocalyptic number.

20346436365640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20346436365640 is an abundant number, since it is smaller than the sum of its proper divisors (36731215857080).

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

20346436365640 is a wasteful number, since it uses less digits than its factorization.

20346436365640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223943 (or 223939 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 52.

The spelling of 20346436365640 in words is "twenty trillion, three hundred forty-six billion, four hundred thirty-six million, three hundred sixty-five thousand, six hundred forty".