19461280380 has 48 divisors (see below), whose sum is σ = 54857325600. Its totient is φ = 5154842368.

The previous prime is 19461280367. The next prime is 19461280393. The reversal of 19461280380 is 8308216491.

It is an interprime number because it is at equal distance from previous prime (19461280367) and next prime (19461280393).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1079499 + ... + 1097378.

It is an arithmetic number, because the mean of its divisors is an integer number (1142860950).

Almost surely, 2^19461280380 is an apocalyptic number.

19461280380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19461280380 is an abundant number, since it is smaller than the sum of its proper divisors (35396045220).

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

19461280380 is a wasteful number, since it uses less digits than its factorization.

19461280380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177038 (or 2177036 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 19461280380 in words is "nineteen billion, four hundred sixty-one million, two hundred eighty thousand, three hundred eighty".