19523040516 has 72 divisors (see below), whose sum is σ = 59717548800. Its totient is φ = 5249892096.

The previous prime is 19523040473. The next prime is 19523040517. The reversal of 19523040516 is 61504032591.

19523040516 is a `hidden beast` number, since 1 + 9 + 5 + 230 + 405 + 16 = 666.

It is a super-2 number, since 2×19523040516² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (19523040517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2274316 + ... + 2282883.

It is an arithmetic number, because the mean of its divisors is an integer number (829410400).

Almost surely, 2^19523040516 is an apocalyptic number.

It is an amenable number.

19523040516 is an abundant number, since it is smaller than the sum of its proper divisors (40194508284).

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

19523040516 is a wasteful number, since it uses less digits than its factorization.

19523040516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557233 (or 4557228 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 19523040516 in words is "nineteen billion, five hundred twenty-three million, forty thousand, five hundred sixteen".