16553493 has 24 divisors (see below), whose sum is σ = 26222976. Its totient is φ = 9979200.

The previous prime is 16553479. The next prime is 16553501. The reversal of 16553493 is 39435561.

16553493 is a `hidden beast` number, since 16 + 553 + 4 + 93 = 666.

It is not a de Polignac number, because 16553493 - 2⁴ = 16553477 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16553413) 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 23 ways as a sum of consecutive naturals, for example, 26521 + ... + 27137.

It is an arithmetic number, because the mean of its divisors is an integer number (1092624).

Almost surely, 2^16553493 is an apocalyptic number.

It is an amenable number.

16553493 is a deficient number, since it is larger than the sum of its proper divisors (9669483).

16553493 is a wasteful number, since it uses less digits than its factorization.

16553493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905 (or 902 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 16553493 is about 4068.5984073142. The cubic root of 16553493 is about 254.8569901694.

The spelling of 16553493 in words is "sixteen million, five hundred fifty-three thousand, four hundred ninety-three".