19752157 has 2 divisors, whose sum is σ = 19752158. Its totient is φ = 19752156.

The previous prime is 19752149. The next prime is 19752163. The reversal of 19752157 is 75125791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14092516 + 5659641 = 3754^2 + 2379^2 .

It is a cyclic number.

It is not a de Polignac number, because 19752157 - 2³ = 19752149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19752107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9876078 + 9876079.

It is an arithmetic number, because the mean of its divisors is an integer number (9876079).

Almost surely, 2^19752157 is an apocalyptic number.

It is an amenable number.

19752157 is a deficient number, since it is larger than the sum of its proper divisors (1).

19752157 is an equidigital number, since it uses as much as digits as its factorization.

19752157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22050, while the sum is 37.

The square root of 19752157 is about 4444.3398834923. The cubic root of 19752157 is about 270.3158489366.

The spelling of 19752157 in words is "nineteen million, seven hundred fifty-two thousand, one hundred fifty-seven".