16421896 has 8 divisors (see below), whose sum is σ = 30791070. Its totient is φ = 8210944.

The previous prime is 16421887. The next prime is 16421897. The reversal of 16421896 is 69812461.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 15319396 + 1102500 = 3914^2 + 1050^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (16421897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1026361 + ... + 1026376.

Almost surely, 2^16421896 is an apocalyptic number.

It is an amenable number.

16421896 is a deficient number, since it is larger than the sum of its proper divisors (14369174).

16421896 is a wasteful number, since it uses less digits than its factorization.

16421896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052743 (or 2052739 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 16421896 is about 4052.3938604237. The cubic root of 16421896 is about 254.1798383332.

The spelling of 16421896 in words is "sixteen million, four hundred twenty-one thousand, eight hundred ninety-six".