16311420 has 36 divisors (see below), whose sum is σ = 49478520. Its totient is φ = 4349664.

The previous prime is 16311419. The next prime is 16311467. The reversal of 16311420 is 2411361.

It is a happy number.

16311420 is a `hidden beast` number, since 1 + 631 + 14 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 16311393 and 16311402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45130 + ... + 45489.

Almost surely, 2^16311420 is an apocalyptic number.

16311420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16311420 is an abundant number, since it is smaller than the sum of its proper divisors (33167100).

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

16311420 is a wasteful number, since it uses less digits than its factorization.

16311420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90634 (or 90629 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 16311420 is about 4038.7399024943. The cubic root of 16311420 is about 253.6085689734.

Adding to 16311420 its reverse (2411361), we get a palindrome (18722781).

The spelling of 16311420 in words is "sixteen million, three hundred eleven thousand, four hundred twenty".