18782947380 has 48 divisors (see below), whose sum is σ = 52940571264. Its totient is φ = 4975612800.

The previous prime is 18782947361. The next prime is 18782947387. The reversal of 18782947380 is 8374928781.

It is a super-2 number, since 2×18782947380² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18782947380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18782947387) 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, 1027527 + ... + 1045646.

It is an arithmetic number, because the mean of its divisors is an integer number (1102928568).

Almost surely, 2^18782947380 is an apocalyptic number.

18782947380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18782947380 is an abundant number, since it is smaller than the sum of its proper divisors (34157623884).

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

18782947380 is a wasteful number, since it uses less digits than its factorization.

18782947380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073336 (or 2073334 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 57.

The spelling of 18782947380 in words is "eighteen billion, seven hundred eighty-two million, nine hundred forty-seven thousand, three hundred eighty".