20345503281600 has 336 divisors, whose sum is σ = 79602732384768. Its totient is φ = 4448209244160.

The previous prime is 20345503281557. The next prime is 20345503281619. The reversal of 20345503281600 is 618230554302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12390699 + ... + 13936298.

Almost surely, 2^{20345503281600} is an apocalyptic number.

20345503281600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20345503281600 is an abundant number, since it is smaller than the sum of its proper divisors (59257229103168).

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

20345503281600 is a wasteful number, since it uses less digits than its factorization.

20345503281600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26327052 (or 26327037 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 20345503281600 in words is "twenty trillion, three hundred forty-five billion, five hundred three million, two hundred eighty-one thousand, six hundred".