19427194656 has 192 divisors, whose sum is σ = 60049382400. Its totient is φ = 6099609600.

The previous prime is 19427194547. The next prime is 19427194663. The reversal of 19427194656 is 65649172491.

It is a super-2 number, since 2×19427194656² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1017841 + ... + 1036751.

It is an arithmetic number, because the mean of its divisors is an integer number (312757200).

Almost surely, 2^19427194656 is an apocalyptic number.

19427194656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19427194656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30024691200).

19427194656 is an abundant number, since it is smaller than the sum of its proper divisors (40622187744).

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

19427194656 is a wasteful number, since it uses less digits than its factorization.

19427194656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19000 (or 18986 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 19427194656 in words is "nineteen billion, four hundred twenty-seven million, one hundred ninety-four thousand, six hundred fifty-six".