20124407 has 2 divisors, whose sum is σ = 20124408. Its totient is φ = 20124406.

The previous prime is 20124397. The next prime is 20124409. The reversal of 20124407 is 70442102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20124407 - 2¹⁸ = 19862263 is a prime.

Together with 20124409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20124409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062203 + 10062204.

It is an arithmetic number, because the mean of its divisors is an integer number (10062204).

Almost surely, 2^20124407 is an apocalyptic number.

20124407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124407 is an equidigital number, since it uses as much as digits as its factorization.

20124407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 20124407 is about 4486.0235175487. The cubic root of 20124407 is about 272.0034196153.

Adding to 20124407 its reverse (70442102), we get a palindrome (90566509).

The spelling of 20124407 in words is "twenty million, one hundred twenty-four thousand, four hundred seven".