20266044602642 has 16 divisors (see below), whose sum is σ = 30907135124640. Its totient is φ = 9965048726688.

The previous prime is 20266044602611. The next prime is 20266044602651. The reversal of 20266044602642 is 24620644066202.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20266044602593 and 20266044602602.

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, 345595292 + ... + 345653927.

It is an arithmetic number, because the mean of its divisors is an integer number (1931695945290).

Almost surely, 2^{20266044602642} is an apocalyptic number.

20266044602642 is a deficient number, since it is larger than the sum of its proper divisors (10641090521998).

20266044602642 is a wasteful number, since it uses less digits than its factorization.

20266044602642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691249465.

The product of its (nonzero) digits is 1327104, while the sum is 44.

Adding to 20266044602642 its reverse (24620644066202), we get a palindrome (44886688668844).

The spelling of 20266044602642 in words is "twenty trillion, two hundred sixty-six billion, forty-four million, six hundred two thousand, six hundred forty-two".