16372420 has 12 divisors (see below), whose sum is σ = 34382124. Its totient is φ = 6548960.

The previous prime is 16372409. The next prime is 16372423. The reversal of 16372420 is 2427361.

It can be written as a sum of positive squares in 2 ways, for example, as 6081156 + 10291264 = 2466^2 + 3208^2 .

It is a super-2 number, since 2×16372420² = 536112273312800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16372423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409291 + ... + 409330.

It is an arithmetic number, because the mean of its divisors is an integer number (2865177).

Almost surely, 2^16372420 is an apocalyptic number.

16372420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16372420 is an abundant number, since it is smaller than the sum of its proper divisors (18009704).

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

16372420 is a wasteful number, since it uses less digits than its factorization.

16372420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818630 (or 818628 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 16372420 is about 4046.2847156373. The cubic root of 16372420 is about 253.9243166332.

Adding to 16372420 its reverse (2427361), we get a palindrome (18799781).

The spelling of 16372420 in words is "sixteen million, three hundred seventy-two thousand, four hundred twenty".