20555551024340 has 48 divisors (see below), whose sum is σ = 43909832901312. Its totient is φ = 8081217171456.

The previous prime is 20555551024313. The next prime is 20555551024363. The reversal of 20555551024340 is 4342015555502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16720109 + ... + 17907348.

It is an arithmetic number, because the mean of its divisors is an integer number (914788185444).

Almost surely, 2^{20555551024340} is an apocalyptic number.

20555551024340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20555551024340 is an abundant number, since it is smaller than the sum of its proper divisors (23354281876972).

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

20555551024340 is a wasteful number, since it uses less digits than its factorization.

20555551024340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34627976 (or 34627974 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 41.

Adding to 20555551024340 its reverse (4342015555502), we get a palindrome (24897566579842).

The spelling of 20555551024340 in words is "twenty trillion, five hundred fifty-five billion, five hundred fifty-one million, twenty-four thousand, three hundred forty".