20440066046242 has 16 divisors (see below), whose sum is σ = 32082877767672. Its totient is φ = 9756196744320.

The previous prime is 20440066046171. The next prime is 20440066046243. The reversal of 20440066046242 is 24264066004402.

It can be written as a sum of positive squares in 4 ways, for example, as 17686726502481 + 2753339543761 = 4205559^2 + 1659319^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20440066046195 and 20440066046204.

It is not an unprimeable number, because it can be changed into a prime (20440066046243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2605817859 + ... + 2605825702.

Almost surely, 2^{20440066046242} is an apocalyptic number.

20440066046242 is a deficient number, since it is larger than the sum of its proper divisors (11642811721430).

20440066046242 is a wasteful number, since it uses less digits than its factorization.

20440066046242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211643653.

The product of its (nonzero) digits is 442368, while the sum is 40.

The spelling of 20440066046242 in words is "twenty trillion, four hundred forty billion, sixty-six million, forty-six thousand, two hundred forty-two".