20442440242445 has 16 divisors (see below), whose sum is σ = 26570627545392. Its totient is φ = 15008696002560.

The previous prime is 20442440242423. The next prime is 20442440242489. The reversal of 20442440242445 is 54424204424402.

It can be written as a sum of positive squares in 8 ways, for example, as 1511082606121 + 18931357636324 = 1229261^2 + 4351018^2 .

It is not a de Polignac number, because 20442440242445 - 2⁶ = 20442440242381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908945636 + ... + 908968125.

It is an arithmetic number, because the mean of its divisors is an integer number (1660664221587).

Almost surely, 2^{20442440242445} is an apocalyptic number.

It is an amenable number.

20442440242445 is a deficient number, since it is larger than the sum of its proper divisors (6128187302947).

20442440242445 is a wasteful number, since it uses less digits than its factorization.

20442440242445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817913952.

The product of its (nonzero) digits is 1310720, while the sum is 41.

Adding to 20442440242445 its reverse (54424204424402), we get a palindrome (74866644666847).

The spelling of 20442440242445 in words is "twenty trillion, four hundred forty-two billion, four hundred forty million, two hundred forty-two thousand, four hundred forty-five".