20105244045440 has 64 divisors (see below), whose sum is σ = 48064661184960. Its totient is φ = 8042003561472.

The previous prime is 20105244045329. The next prime is 20105244045479. The reversal of 20105244045440 is 4454044250102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 20105244045440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86541917 + ... + 86773923.

It is an arithmetic number, because the mean of its divisors is an integer number (751010331015).

Almost surely, 2^{20105244045440} is an apocalyptic number.

20105244045440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20105244045440 is an abundant number, since it is smaller than the sum of its proper divisors (27959417139520).

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

20105244045440 is a wasteful number, since it uses less digits than its factorization.

20105244045440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367429 (or 367417 counting only the distinct ones).

The product of its (nonzero) digits is 102400, while the sum is 35.

Adding to 20105244045440 its reverse (4454044250102), we get a palindrome (24559288295542).

The spelling of 20105244045440 in words is "twenty trillion, one hundred five billion, two hundred forty-four million, forty-five thousand, four hundred forty".