20402442244440 has 96 divisors (see below), whose sum is σ = 69190891117920. Its totient is φ = 5204101208064.

The previous prime is 20402442244411. The next prime is 20402442244451. The reversal of 20402442244440 is 4444224420402.

20402442244440 is a `hidden beast` number, since 2 + 0 + 402 + 4 + 4 + 2 + 244 + 4 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20402442244395 and 20402442244404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1232023257 + ... + 1232039816.

It is an arithmetic number, because the mean of its divisors is an integer number (720738449145).

Almost surely, 2^{20402442244440} is an apocalyptic number.

20402442244440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20402442244440 is an abundant number, since it is smaller than the sum of its proper divisors (48788448873480).

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

20402442244440 is a wasteful number, since it uses less digits than its factorization.

20402442244440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464063113 (or 2464063106 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 36.

Adding to 20402442244440 its reverse (4444224420402), we get a palindrome (24846666664842).

The spelling of 20402442244440 in words is "twenty trillion, four hundred two billion, four hundred forty-two million, two hundred forty-four thousand, four hundred forty".