19936157 has 2 divisors, whose sum is σ = 19936158. Its totient is φ = 19936156.

The previous prime is 19936153. The next prime is 19936171. The reversal of 19936157 is 75163991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15912121 + 4024036 = 3989^2 + 2006^2 .

It is a cyclic number.

It is not a de Polignac number, because 19936157 - 2² = 19936153 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19936151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9968078 + 9968079.

It is an arithmetic number, because the mean of its divisors is an integer number (9968079).

Almost surely, 2^19936157 is an apocalyptic number.

It is an amenable number.

19936157 is a deficient number, since it is larger than the sum of its proper divisors (1).

19936157 is an equidigital number, since it uses as much as digits as its factorization.

19936157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51030, while the sum is 41.

The square root of 19936157 is about 4464.9923852119. The cubic root of 19936157 is about 271.1526261798.

The spelling of 19936157 in words is "nineteen million, nine hundred thirty-six thousand, one hundred fifty-seven".