20194831 has 2 divisors, whose sum is σ = 20194832. Its totient is φ = 20194830.

The previous prime is 20194799. The next prime is 20194841. The reversal of 20194831 is 13849102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20194831 - 2⁵ = 20194799 is a prime.

It is a super-2 number, since 2×20194831² = 815662398237122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20194831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20194841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10097415 + 10097416.

It is an arithmetic number, because the mean of its divisors is an integer number (10097416).

Almost surely, 2^20194831 is an apocalyptic number.

20194831 is a deficient number, since it is larger than the sum of its proper divisors (1).

20194831 is an equidigital number, since it uses as much as digits as its factorization.

20194831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 20194831 is about 4493.8659303544. The cubic root of 20194831 is about 272.3203360777.

It can be divided in two parts, 20194 and 831, that added together give a square (21025 = 145²).

The spelling of 20194831 in words is "twenty million, one hundred ninety-four thousand, eight hundred thirty-one".