20918381843342 has 32 divisors (see below), whose sum is σ = 32768728699392. Its totient is φ = 9996222433824.

The previous prime is 20918381843327. The next prime is 20918381843371. The reversal of 20918381843342 is 24334818381902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 410759093 + ... + 410810015.

It is an arithmetic number, because the mean of its divisors is an integer number (1024022771856).

Almost surely, 2^{20918381843342} is an apocalyptic number.

20918381843342 is a deficient number, since it is larger than the sum of its proper divisors (11850346856050).

20918381843342 is a wasteful number, since it uses less digits than its factorization.

20918381843342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58112.

The product of its (nonzero) digits is 7962624, while the sum is 56.

The spelling of 20918381843342 in words is "twenty trillion, nine hundred eighteen billion, three hundred eighty-one million, eight hundred forty-three thousand, three hundred forty-two".