19725037 has 2 divisors, whose sum is σ = 19725038. Its totient is φ = 19725036.

The previous prime is 19725029. The next prime is 19725071. The reversal of 19725037 is 73052791.

It is an a-pointer prime, because the next prime (19725071) can be obtained adding 19725037 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17926756 + 1798281 = 4234^2 + 1341^2 .

It is a cyclic number.

It is not a de Polignac number, because 19725037 - 2³ = 19725029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19724993 and 19725011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19725077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9862518 + 9862519.

It is an arithmetic number, because the mean of its divisors is an integer number (9862519).

Almost surely, 2^19725037 is an apocalyptic number.

It is an amenable number.

19725037 is a deficient number, since it is larger than the sum of its proper divisors (1).

19725037 is an equidigital number, since it uses as much as digits as its factorization.

19725037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 19725037 is about 4441.2877637010. The cubic root of 19725037 is about 270.1920764029.

The spelling of 19725037 in words is "nineteen million, seven hundred twenty-five thousand, thirty-seven".