20380213680 has 80 divisors (see below), whose sum is σ = 63201725664. Its totient is φ = 5432739840.

The previous prime is 20380213663. The next prime is 20380213687. The reversal of 20380213680 is 8631208302.

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

It is not an unprimeable number, because it can be changed into a prime (20380213687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 714900 + ... + 742860.

Almost surely, 2^20380213680 is an apocalyptic number.

20380213680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20380213680 is an abundant number, since it is smaller than the sum of its proper divisors (42821511984).

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

20380213680 is a wasteful number, since it uses less digits than its factorization.

20380213680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31014 (or 31008 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 20380213680 in words is "twenty billion, three hundred eighty million, two hundred thirteen thousand, six hundred eighty".