20473867 has 2 divisors, whose sum is σ = 20473868. Its totient is φ = 20473866.

The previous prime is 20473823. The next prime is 20473879. The reversal of 20473867 is 76837402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20473867 - 2¹¹ = 20471819 is a prime.

It is not a weakly prime, because it can be changed into another prime (20473067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10236933 + 10236934.

It is an arithmetic number, because the mean of its divisors is an integer number (10236934).

Almost surely, 2^20473867 is an apocalyptic number.

20473867 is a deficient number, since it is larger than the sum of its proper divisors (1).

20473867 is an equidigital number, since it uses as much as digits as its factorization.

20473867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 20473867 is about 4524.8057416866. The cubic root of 20473867 is about 273.5688381102.

The spelling of 20473867 in words is "twenty million, four hundred seventy-three thousand, eight hundred sixty-seven".