19149980 has 12 divisors (see below), whose sum is σ = 40215000. Its totient is φ = 7659984.

The previous prime is 19149959. The next prime is 19149983. The reversal of 19149980 is 8994191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19149983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478730 + ... + 478769.

It is an arithmetic number, because the mean of its divisors is an integer number (3351250).

Almost surely, 2^19149980 is an apocalyptic number.

19149980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19149980 is an abundant number, since it is smaller than the sum of its proper divisors (21065020).

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

19149980 is a wasteful number, since it uses less digits than its factorization.

19149980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957508 (or 957506 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 19149980 is about 4376.0690122529. The cubic root of 19149980 is about 267.5404428327.

The spelling of 19149980 in words is "nineteen million, one hundred forty-nine thousand, nine hundred eighty".