19321949 has 2 divisors, whose sum is σ = 19321950. Its totient is φ = 19321948.

The previous prime is 19321937. The next prime is 19321963. The reversal of 19321949 is 94912391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18748900 + 573049 = 4330^2 + 757^2 .

It is a cyclic number.

It is not a de Polignac number, because 19321949 - 2²⁰ = 18273373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19321919) 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 as a sum of consecutive naturals, namely, 9660974 + 9660975.

It is an arithmetic number, because the mean of its divisors is an integer number (9660975).

Almost surely, 2^19321949 is an apocalyptic number.

It is an amenable number.

19321949 is a deficient number, since it is larger than the sum of its proper divisors (1).

19321949 is an equidigital number, since it uses as much as digits as its factorization.

19321949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 38.

The square root of 19321949 is about 4395.6738960028. The cubic root of 19321949 is about 268.3389053620.

The spelling of 19321949 in words is "nineteen million, three hundred twenty-one thousand, nine hundred forty-nine".