20194357 has 2 divisors, whose sum is σ = 20194358. Its totient is φ = 20194356.

The previous prime is 20194327. The next prime is 20194381. The reversal of 20194357 is 75349102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13439556 + 6754801 = 3666^2 + 2599^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20194357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20194327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097178 + 10097179.

It is an arithmetic number, because the mean of its divisors is an integer number (10097179).

Almost surely, 2^20194357 is an apocalyptic number.

It is an amenable number.

20194357 is a deficient number, since it is larger than the sum of its proper divisors (1).

20194357 is an equidigital number, since it uses as much as digits as its factorization.

20194357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 20194357 is about 4493.8131914889. The cubic root of 20194357 is about 272.3182054855.

The spelling of 20194357 in words is "twenty million, one hundred ninety-four thousand, three hundred fifty-seven".