20802371 has 2 divisors, whose sum is σ = 20802372. Its totient is φ = 20802370.

The previous prime is 20802317. The next prime is 20802391. The reversal of 20802371 is 17320802.

Together with previous prime (20802317) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20802371 - 2⁶ = 20802307 is a prime.

It is not a weakly prime, because it can be changed into another prime (20802311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10401185 + 10401186.

It is an arithmetic number, because the mean of its divisors is an integer number (10401186).

Almost surely, 2^20802371 is an apocalyptic number.

20802371 is a deficient number, since it is larger than the sum of its proper divisors (1).

20802371 is an equidigital number, since it uses as much as digits as its factorization.

20802371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 20802371 is about 4560.9616310598. The cubic root of 20802371 is about 275.0242226597.

The spelling of 20802371 in words is "twenty million, eight hundred two thousand, three hundred seventy-one".