20625379 has 2 divisors, whose sum is σ = 20625380. Its totient is φ = 20625378.

The previous prime is 20625377. The next prime is 20625413. The reversal of 20625379 is 97352602.

It is a happy number.

It is an a-pointer prime, because the next prime (20625413) can be obtained adding 20625379 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20625379 - 2¹ = 20625377 is a prime.

Together with 20625377, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (20625377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10312689 + 10312690.

It is an arithmetic number, because the mean of its divisors is an integer number (10312690).

Almost surely, 2^20625379 is an apocalyptic number.

20625379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20625379 is an equidigital number, since it uses as much as digits as its factorization.

20625379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 20625379 is about 4541.5172574812. The cubic root of 20625379 is about 274.2420074026.

The spelling of 20625379 in words is "twenty million, six hundred twenty-five thousand, three hundred seventy-nine".