16432451233421 has 2 divisors, whose sum is σ = 16432451233422. Its totient is φ = 16432451233420.

The previous prime is 16432451233351. The next prime is 16432451233427. The reversal of 16432451233421 is 12433215423461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16058012490025 + 374438743396 = 4007245^2 + 611914^2 .

It is a cyclic number.

It is not a de Polignac number, because 16432451233421 - 2¹⁴ = 16432451217037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16432451233427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8216225616710 + 8216225616711.

It is an arithmetic number, because the mean of its divisors is an integer number (8216225616711).

Almost surely, 2^{16432451233421} is an apocalyptic number.

It is an amenable number.

16432451233421 is a deficient number, since it is larger than the sum of its proper divisors (1).

16432451233421 is an equidigital number, since it uses as much as digits as its factorization.

16432451233421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 41.

Adding to 16432451233421 its reverse (12433215423461), we get a palindrome (28865666656882).

The spelling of 16432451233421 in words is "sixteen trillion, four hundred thirty-two billion, four hundred fifty-one million, two hundred thirty-three thousand, four hundred twenty-one".