17423420 has 72 divisors (see below), whose sum is σ = 44470944. Its totient is φ = 5706624.

The previous prime is 17423407. The next prime is 17423423. The reversal of 17423420 is 2432471.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (17423423) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22154 + ... + 22926.

It is an arithmetic number, because the mean of its divisors is an integer number (617652).

Almost surely, 2^17423420 is an apocalyptic number.

17423420 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 17423420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22235472).

17423420 is an abundant number, since it is smaller than the sum of its proper divisors (27047524).

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

17423420 is a wasteful number, since it uses less digits than its factorization.

17423420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 17423420 is about 4174.1370365622. The cubic root of 17423420 is about 259.2454454368.

Adding to 17423420 its reverse (2432471), we get a palindrome (19855891).

The spelling of 17423420 in words is "seventeen million, four hundred twenty-three thousand, four hundred twenty".