20454141440 has 80 divisors (see below), whose sum is σ = 51623280720. Its totient is φ = 7751024640.

The previous prime is 20454141349. The next prime is 20454141473. The reversal of 20454141440 is 4414145402.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161621 + ... + 258900.

It is an arithmetic number, because the mean of its divisors is an integer number (645291009).

Almost surely, 2^20454141440 is an apocalyptic number.

20454141440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20454141440 is an abundant number, since it is smaller than the sum of its proper divisors (31169139280).

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

20454141440 is an equidigital number, since it uses as much as digits as its factorization.

20454141440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420563 (or 420547 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 29.

Adding to 20454141440 its reverse (4414145402), we get a palindrome (24868286842).

The spelling of 20454141440 in words is "twenty billion, four hundred fifty-four million, one hundred forty-one thousand, four hundred forty".