19672537 has 2 divisors, whose sum is σ = 19672538. Its totient is φ = 19672536.

The previous prime is 19672517. The next prime is 19672573. The reversal of 19672537 is 73527691.

Together with next prime (19672573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18181696 + 1490841 = 4264^2 + 1221^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19672537 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19672537.

It is not a weakly prime, because it can be changed into another prime (19672517) 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, 9836268 + 9836269.

It is an arithmetic number, because the mean of its divisors is an integer number (9836269).

Almost surely, 2^19672537 is an apocalyptic number.

It is an amenable number.

19672537 is a deficient number, since it is larger than the sum of its proper divisors (1).

19672537 is an equidigital number, since it uses as much as digits as its factorization.

19672537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 40.

The square root of 19672537 is about 4435.3733777440. The cubic root of 19672537 is about 269.9521497279.

The spelling of 19672537 in words is "nineteen million, six hundred seventy-two thousand, five hundred thirty-seven".