19497408937 has 2 divisors, whose sum is σ = 19497408938. Its totient is φ = 19497408936.

The previous prime is 19497408929. The next prime is 19497408941. The reversal of 19497408937 is 73980479491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17789157376 + 1708251561 = 133376^2 + 41331^2 .

It is a cyclic number.

It is not a de Polignac number, because 19497408937 - 2³ = 19497408929 is a prime.

It is not a weakly prime, because it can be changed into another prime (19497408967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9748704468 + 9748704469.

It is an arithmetic number, because the mean of its divisors is an integer number (9748704469).

Almost surely, 2^19497408937 is an apocalyptic number.

It is an amenable number.

19497408937 is a deficient number, since it is larger than the sum of its proper divisors (1).

19497408937 is an equidigital number, since it uses as much as digits as its factorization.

19497408937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 19497408937 in words is "nineteen billion, four hundred ninety-seven million, four hundred eight thousand, nine hundred thirty-seven".