19145541980 has 12 divisors (see below), whose sum is σ = 40205638200. Its totient is φ = 7658216784.

The previous prime is 19145541971. The next prime is 19145541983. The reversal of 19145541980 is 8914554191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19145541983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 478638530 + ... + 478638569.

It is an arithmetic number, because the mean of its divisors is an integer number (3350469850).

Almost surely, 2^19145541980 is an apocalyptic number.

19145541980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19145541980 is an abundant number, since it is smaller than the sum of its proper divisors (21060096220).

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

19145541980 is a wasteful number, since it uses less digits than its factorization.

19145541980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 957277108 (or 957277106 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 47.

The spelling of 19145541980 in words is "nineteen billion, one hundred forty-five million, five hundred forty-one thousand, nine hundred eighty".