19745051 has 2 divisors, whose sum is σ = 19745052. Its totient is φ = 19745050.

The previous prime is 19745039. The next prime is 19745069. The reversal of 19745051 is 15054791.

It is a weak prime.

It is an emirp because it is prime and its reverse (15054791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19745051 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 19744999 and 19745017.

It is not a weakly prime, because it can be changed into another prime (19745021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9872525 + 9872526.

It is an arithmetic number, because the mean of its divisors is an integer number (9872526).

Almost surely, 2^19745051 is an apocalyptic number.

19745051 is a deficient number, since it is larger than the sum of its proper divisors (1).

19745051 is an equidigital number, since it uses as much as digits as its factorization.

19745051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 32.

The square root of 19745051 is about 4443.5403677698. The cubic root of 19745051 is about 270.2834289362.

The spelling of 19745051 in words is "nineteen million, seven hundred forty-five thousand, fifty-one".