16523434 has 12 divisors (see below), whose sum is σ = 25613442. Its totient is φ = 7994280.

The previous prime is 16523431. The next prime is 16523443. The reversal of 16523434 is 43432561.

It can be written as a sum of positive squares in only one way, i.e., 12709225 + 3814209 = 3565^2 + 1953^2 .

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (16523431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2377 + ... + 6220.

Almost surely, 2^16523434 is an apocalyptic number.

16523434 is a deficient number, since it is larger than the sum of its proper divisors (9090008).

16523434 is an equidigital number, since it uses as much as digits as its factorization.

16523434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8661 (or 8630 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 16523434 is about 4064.9027048627. The cubic root of 16523434 is about 254.7026342695.

Adding to 16523434 its reverse (43432561), we get a palindrome (59955995).

The spelling of 16523434 in words is "sixteen million, five hundred twenty-three thousand, four hundred thirty-four".