19232920 has 64 divisors (see below), whose sum is σ = 49896000. Its totient is φ = 6535680.

The previous prime is 19232909. The next prime is 19232923. The reversal of 19232920 is 2923291.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19232923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41490 + ... + 41950.

It is an arithmetic number, because the mean of its divisors is an integer number (779625).

Almost surely, 2^19232920 is an apocalyptic number.

19232920 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 19232920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24948000).

19232920 is an abundant number, since it is smaller than the sum of its proper divisors (30663080).

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

19232920 is a wasteful number, since it uses less digits than its factorization.

19232920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 19232920 is about 4385.5353151012. The cubic root of 19232920 is about 267.9261324601.

The spelling of 19232920 in words is "nineteen million, two hundred thirty-two thousand, nine hundred twenty".