16421594 has 16 divisors (see below), whose sum is σ = 28203648. Its totient is φ = 7024752.

The previous prime is 16421593. The next prime is 16421597. The reversal of 16421594 is 49512461.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16421594.

It is not an unprimeable number, because it can be changed into a prime (16421593) 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, 12932 + ... + 14144.

It is an arithmetic number, because the mean of its divisors is an integer number (1762728).

Almost surely, 2^16421594 is an apocalyptic number.

16421594 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16421594 is a deficient number, since it is larger than the sum of its proper divisors (11782054).

16421594 is a wasteful number, since it uses less digits than its factorization.

16421594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189.

The product of its digits is 8640, while the sum is 32.

The square root of 16421594 is about 4052.3565983265. The cubic root of 16421594 is about 254.1782801944.

The spelling of 16421594 in words is "sixteen million, four hundred twenty-one thousand, five hundred ninety-four".