19494432 has 144 divisors (see below), whose sum is σ = 60540480. Its totient is φ = 6158592.

The previous prime is 19494389. The next prime is 19494463. The reversal of 19494432 is 23449491.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178794 + ... + 178902.

It is an arithmetic number, because the mean of its divisors is an integer number (420420).

Almost surely, 2^19494432 is an apocalyptic number.

19494432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

19494432 is the 2208-th decagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19494432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30270240).

19494432 is an abundant number, since it is smaller than the sum of its proper divisors (41046048).

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

19494432 is a wasteful number, since it uses less digits than its factorization.

19494432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157 (or 137 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 19494432 is about 4415.2499363003. The cubic root of 19494432 is about 269.1350095948.

The spelling of 19494432 in words is "nineteen million, four hundred ninety-four thousand, four hundred thirty-two".