19619845380 has 48 divisors (see below), whose sum is σ = 61039520640. Its totient is φ = 5231958624.

The previous prime is 19619845351. The next prime is 19619845381. The reversal of 19619845380 is 8354891691.

19619845380 is a `hidden beast` number, since 1 + 96 + 19 + 8 + 4 + 538 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (19619845381) 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, 18165984 + ... + 18167063.

It is an arithmetic number, because the mean of its divisors is an integer number (1271656680).

Almost surely, 2^19619845380 is an apocalyptic number.

19619845380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19619845380 is an abundant number, since it is smaller than the sum of its proper divisors (41419675260).

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

19619845380 is a wasteful number, since it uses less digits than its factorization.

19619845380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36333065 (or 36333057 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The spelling of 19619845380 in words is "nineteen billion, six hundred nineteen million, eight hundred forty-five thousand, three hundred eighty".