20624467 has 2 divisors, whose sum is σ = 20624468. Its totient is φ = 20624466.

The previous prime is 20624447. The next prime is 20624479. The reversal of 20624467 is 76442602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20624467 - 2⁷ = 20624339 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20624447) 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, 10312233 + 10312234.

It is an arithmetic number, because the mean of its divisors is an integer number (10312234).

Almost surely, 2^20624467 is an apocalyptic number.

20624467 is a deficient number, since it is larger than the sum of its proper divisors (1).

20624467 is an equidigital number, since it uses as much as digits as its factorization.

20624467 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 20624467 is about 4541.4168493984. The cubic root of 20624467 is about 274.2379652563.

The spelling of 20624467 in words is "twenty million, six hundred twenty-four thousand, four hundred sixty-seven".