19012380 has 48 divisors (see below), whose sum is σ = 53996544. Its totient is φ = 4997440.

The previous prime is 19012379. The next prime is 19012381. The reversal of 19012380 is 8321091.

It is an interprime number because it is at equal distance from previous prime (19012379) and next prime (19012381).

It is a super-2 number, since 2×19012380² = 722941186528800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19012380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19012381) 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, 2029 + ... + 6491.

It is an arithmetic number, because the mean of its divisors is an integer number (1124928).

Almost surely, 2^19012380 is an apocalyptic number.

19012380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19012380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26998272).

19012380 is an abundant number, since it is smaller than the sum of its proper divisors (34984164).

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

19012380 is a wasteful number, since it uses less digits than its factorization.

19012380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546 (or 4544 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 19012380 is about 4360.3187956846. The cubic root of 19012380 is about 266.8981081004.

The spelling of 19012380 in words is "nineteen million, twelve thousand, three hundred eighty".