20792381 has 2 divisors, whose sum is σ = 20792382. Its totient is φ = 20792380.

The previous prime is 20792363. The next prime is 20792389. The reversal of 20792381 is 18329702.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20557156 + 235225 = 4534^2 + 485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20792381 is a prime.

It is a super-2 number, since 2×20792381² = 864646215298322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20792389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10396190 + 10396191.

It is an arithmetic number, because the mean of its divisors is an integer number (10396191).

Almost surely, 2^20792381 is an apocalyptic number.

It is an amenable number.

20792381 is a deficient number, since it is larger than the sum of its proper divisors (1).

20792381 is an equidigital number, since it uses as much as digits as its factorization.

20792381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 20792381 is about 4559.8663357603. The cubic root of 20792381 is about 274.9801903086.

The spelling of 20792381 in words is "twenty million, seven hundred ninety-two thousand, three hundred eighty-one".