16724420 has 24 divisors (see below), whose sum is σ = 35939904. Its totient is φ = 6533856.

The previous prime is 16724399. The next prime is 16724423. The reversal of 16724420 is 2442761.

It is a self number, because there is not a number n which added to its sum of digits gives 16724420.

It is not an unprimeable number, because it can be changed into a prime (16724423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8864 + ... + 10583.

It is an arithmetic number, because the mean of its divisors is an integer number (1497496).

Almost surely, 2^16724420 is an apocalyptic number.

16724420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16724420 is an abundant number, since it is smaller than the sum of its proper divisors (19215484).

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

16724420 is a wasteful number, since it uses less digits than its factorization.

16724420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19499 (or 19497 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 16724420 is about 4089.5500975046. The cubic root of 16724420 is about 255.7311834817.

The spelling of 16724420 in words is "sixteen million, seven hundred twenty-four thousand, four hundred twenty".