20403709818380 has 96 divisors (see below), whose sum is σ = 49114611366912. Its totient is φ = 6974768736000.

The previous prime is 20403709818377. The next prime is 20403709818389. The reversal of 20403709818380 is 8381890730402.

20403709818380 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×20403709818380² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20403709818389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 74247230 + ... + 74521530.

It is an arithmetic number, because the mean of its divisors is an integer number (511610535072).

Almost surely, 2^{20403709818380} is an apocalyptic number.

20403709818380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20403709818380 is an abundant number, since it is smaller than the sum of its proper divisors (28710901548532).

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

20403709818380 is a wasteful number, since it uses less digits than its factorization.

20403709818380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275895 (or 275893 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 20403709818380 in words is "twenty trillion, four hundred three billion, seven hundred nine million, eight hundred eighteen thousand, three hundred eighty".