19431122064 has 40 divisors (see below), whose sum is σ = 50202947520. Its totient is φ = 6476281728.

The previous prime is 19431122041. The next prime is 19431122071. The reversal of 19431122064 is 46022113491.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517494 + ... + 553770.

It is an arithmetic number, because the mean of its divisors is an integer number (1255073688).

Almost surely, 2^19431122064 is an apocalyptic number.

It is an amenable number.

19431122064 is an abundant number, since it is smaller than the sum of its proper divisors (30771825456).

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

19431122064 is a wasteful number, since it uses less digits than its factorization.

19431122064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47447 (or 47441 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 19431122064 in words is "nineteen billion, four hundred thirty-one million, one hundred twenty-two thousand, sixty-four".