20344664021042 has 4 divisors (see below), whose sum is σ = 30516996031566. Its totient is φ = 10172332010520.

The previous prime is 20344664021041. The next prime is 20344664021057. The reversal of 20344664021042 is 24012046644302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10502583711361 + 9842080309681 = 3240769^2 + 3137209^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20344664020987 and 20344664021005.

It is not an unprimeable number, because it can be changed into a prime (20344664021041) by changing a digit.

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 as a sum of consecutive naturals, namely, 5086166005259 + ... + 5086166005262.

Almost surely, 2^{20344664021042} is an apocalyptic number.

20344664021042 is a deficient number, since it is larger than the sum of its proper divisors (10172332010524).

20344664021042 is a wasteful number, since it uses less digits than its factorization.

20344664021042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10172332010523.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 20344664021042 in words is "twenty trillion, three hundred forty-four billion, six hundred sixty-four million, twenty-one thousand, forty-two".