20194119157 has 2 divisors, whose sum is σ = 20194119158. Its totient is φ = 20194119156.

The previous prime is 20194119133. The next prime is 20194119193. The reversal of 20194119157 is 75191149102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16910141521 + 3283977636 = 130039^2 + 57306^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20194119157 is a prime.

It is a super-2 number, since 2×20194119157² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20194119557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097059578 + 10097059579.

It is an arithmetic number, because the mean of its divisors is an integer number (10097059579).

Almost surely, 2^20194119157 is an apocalyptic number.

It is an amenable number.

20194119157 is a deficient number, since it is larger than the sum of its proper divisors (1).

20194119157 is an equidigital number, since it uses as much as digits as its factorization.

20194119157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The spelling of 20194119157 in words is "twenty billion, one hundred ninety-four million, one hundred nineteen thousand, one hundred fifty-seven".