19138863260 has 24 divisors (see below), whose sum is σ = 43845396336. Its totient is φ = 6959586560.

The previous prime is 19138863259. The next prime is 19138863269. The reversal of 19138863260 is 6236883191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19138863269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43497197 + ... + 43497636.

It is an arithmetic number, because the mean of its divisors is an integer number (1826891514).

Almost surely, 2^19138863260 is an apocalyptic number.

19138863260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19138863260 is an abundant number, since it is smaller than the sum of its proper divisors (24706533076).

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

19138863260 is a wasteful number, since it uses less digits than its factorization.

19138863260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86994853 (or 86994851 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 19138863260 in words is "nineteen billion, one hundred thirty-eight million, eight hundred sixty-three thousand, two hundred sixty".