20042040442440 has 64 divisors (see below), whose sum is σ = 61111795469760. Its totient is φ = 5256928638720.

The previous prime is 20042040442397. The next prime is 20042040442477. The reversal of 20042040442440 is 4424404024002.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20042040442398 and 20042040442407.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1368984514 + ... + 1368999153.

It is an arithmetic number, because the mean of its divisors is an integer number (954871804215).

Almost surely, 2^{20042040442440} is an apocalyptic number.

20042040442440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20042040442440 is an abundant number, since it is smaller than the sum of its proper divisors (41069755027320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20042040442440 is a wasteful number, since it uses less digits than its factorization.

20042040442440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737983742 (or 2737983738 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 20042040442440 its reverse (4424404024002), we get a palindrome (24466444466442).

The spelling of 20042040442440 in words is "twenty trillion, forty-two billion, forty million, four hundred forty-two thousand, four hundred forty".