20124479 has 2 divisors, whose sum is σ = 20124480. Its totient is φ = 20124478.

The previous prime is 20124457. The next prime is 20124491. The reversal of 20124479 is 97442102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20124479 - 2¹² = 20120383 is a 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, 10062239 + 10062240.

It is an arithmetic number, because the mean of its divisors is an integer number (10062240).

Almost surely, 2^20124479 is an apocalyptic number.

20124479 is a deficient number, since it is larger than the sum of its proper divisors (1).

20124479 is an equidigital number, since it uses as much as digits as its factorization.

20124479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20124479 is about 4486.0315424660. The cubic root of 20124479 is about 272.0037440012.

The spelling of 20124479 in words is "twenty million, one hundred twenty-four thousand, four hundred seventy-nine".