20607971 has 2 divisors, whose sum is σ = 20607972. Its totient is φ = 20607970.

The previous prime is 20607943. The next prime is 20607991. The reversal of 20607971 is 17970602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20607971 - 2⁶ = 20607907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20607911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10303985 + 10303986.

It is an arithmetic number, because the mean of its divisors is an integer number (10303986).

Almost surely, 2^20607971 is an apocalyptic number.

20607971 is a deficient number, since it is larger than the sum of its proper divisors (1).

20607971 is an equidigital number, since it uses as much as digits as its factorization.

20607971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 20607971 is about 4539.6003128029. The cubic root of 20607971 is about 274.1648314697.

The spelling of 20607971 in words is "twenty million, six hundred seven thousand, nine hundred seventy-one".