19234227440 has 80 divisors (see below), whose sum is σ = 47640700800. Its totient is φ = 7200896256.

The previous prime is 19234227379. The next prime is 19234227451. The reversal of 19234227440 is 4472243291.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 19234227394 and 19234227403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49931 + ... + 202389.

It is an arithmetic number, because the mean of its divisors is an integer number (595508760).

Almost surely, 2^19234227440 is an apocalyptic number.

19234227440 is a gapful number since it is divisible by the number (10) 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 19234227440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23820350400).

19234227440 is an abundant number, since it is smaller than the sum of its proper divisors (28406473360).

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

19234227440 is a wasteful number, since it uses less digits than its factorization.

19234227440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152574 (or 152568 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 19234227440 in words is "nineteen billion, two hundred thirty-four million, two hundred twenty-seven thousand, four hundred forty".