4020440442442 has 4 divisors (see below), whose sum is σ = 6030660663666. Its totient is φ = 2010220221220.

The previous prime is 4020440442407. The next prime is 4020440442451. The reversal of 4020440442442 is 2442440440204.

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., 4011972946081 + 8467496361 = 2002991^2 + 92019^2 .

It is a junction number, because it is equal to n+sod(n) for n = 4020440442398 and 4020440442407.

It is an unprimeable number.

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, 1005110110609 + ... + 1005110110612.

Almost surely, 2^{4020440442442} is an apocalyptic number.

4020440442442 is a deficient number, since it is larger than the sum of its proper divisors (2010220221224).

4020440442442 is a wasteful number, since it uses less digits than its factorization.

4020440442442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010220221223.

The product of its (nonzero) digits is 131072, while the sum is 34.

Adding to 4020440442442 its reverse (2442440440204), we get a palindrome (6462880882646).

The spelling of 4020440442442 in words is "four trillion, twenty billion, four hundred forty million, four hundred forty-two thousand, four hundred forty-two".