20455501104240 has 40 divisors (see below), whose sum is σ = 63412053423888. Its totient is φ = 5454800294400.

The previous prime is 20455501104211. The next prime is 20455501104293. The reversal of 20455501104240 is 4240110555402.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 42615627061 + ... + 42615627540.

Almost surely, 2^{20455501104240} is an apocalyptic number.

20455501104240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20455501104240 is an abundant number, since it is smaller than the sum of its proper divisors (42956552319648).

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

20455501104240 is a wasteful number, since it uses less digits than its factorization.

20455501104240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85231254617 (or 85231254611 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 33.

Adding to 20455501104240 its reverse (4240110555402), we get a palindrome (24695611659642).

The spelling of 20455501104240 in words is "twenty trillion, four hundred fifty-five billion, five hundred one million, one hundred four thousand, two hundred forty".