19840937 has 2 divisors, whose sum is σ = 19840938. Its totient is φ = 19840936.

The previous prime is 19840913. The next prime is 19840967. The reversal of 19840937 is 73904891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11978521 + 7862416 = 3461^2 + 2804^2 .

It is an emirp because it is prime and its reverse (73904891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19840937 - 2¹⁰ = 19839913 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 19840894 and 19840903.

It is not a weakly prime, because it can be changed into another prime (19840967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9920468 + 9920469.

It is an arithmetic number, because the mean of its divisors is an integer number (9920469).

Almost surely, 2^19840937 is an apocalyptic number.

It is an amenable number.

19840937 is a deficient number, since it is larger than the sum of its proper divisors (1).

19840937 is an equidigital number, since it uses as much as digits as its factorization.

19840937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 19840937 is about 4454.3166703772. The cubic root of 19840937 is about 270.7202397926.

The spelling of 19840937 in words is "nineteen million, eight hundred forty thousand, nine hundred thirty-seven".