20344042065642 has 16 divisors (see below), whose sum is σ = 41355101904672. Its totient is φ = 6670177726320.

The previous prime is 20344042065629. The next prime is 20344042065661. The reversal of 20344042065642 is 24656024044302.

It is a super-2 number, since 2×20344042065642² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20344042065594 and 20344042065603.

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, 27792406828 + ... + 27792407559.

It is an arithmetic number, because the mean of its divisors is an integer number (2584693869042).

Almost surely, 2^{20344042065642} is an apocalyptic number.

20344042065642 is an abundant number, since it is smaller than the sum of its proper divisors (21011059839030).

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

20344042065642 is a wasteful number, since it uses less digits than its factorization.

20344042065642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55584814453.

The product of its (nonzero) digits is 1105920, while the sum is 42.

The spelling of 20344042065642 in words is "twenty trillion, three hundred forty-four billion, forty-two million, sixty-five thousand, six hundred forty-two".