16454138 has 4 divisors (see below), whose sum is σ = 24681210. Its totient is φ = 8227068.

The previous prime is 16454117. The next prime is 16454143. The reversal of 16454138 is 83145461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83145461 = 7 ⋅11877923.

It can be written as a sum of positive squares in only one way, i.e., 12482089 + 3972049 = 3533^2 + 1993^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4113533 + ... + 4113536.

Almost surely, 2^16454138 is an apocalyptic number.

16454138 is a deficient number, since it is larger than the sum of its proper divisors (8227072).

16454138 is an equidigital number, since it uses as much as digits as its factorization.

16454138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8227071.

The product of its digits is 11520, while the sum is 32.

The square root of 16454138 is about 4056.3700521525. The cubic root of 16454138 is about 254.3460779437.

Adding to 16454138 its reverse (83145461), we get a palindrome (99599599).

The spelling of 16454138 in words is "sixteen million, four hundred fifty-four thousand, one hundred thirty-eight".