20425787 has 2 divisors, whose sum is σ = 20425788. Its totient is φ = 20425786.

The previous prime is 20425781. The next prime is 20425793. The reversal of 20425787 is 78752402.

It is a balanced prime because it is at equal distance from previous prime (20425781) and next prime (20425793).

It is a cyclic number.

It is not a de Polignac number, because 20425787 - 2¹² = 20421691 is a prime.

It is not a weakly prime, because it can be changed into another prime (20425781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212893 + 10212894.

It is an arithmetic number, because the mean of its divisors is an integer number (10212894).

Almost surely, 2^20425787 is an apocalyptic number.

20425787 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425787 is an equidigital number, since it uses as much as digits as its factorization.

20425787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 20425787 is about 4519.4896835815. The cubic root of 20425787 is about 273.3545242676.

It can be divided in two parts, 20425 and 787, that added together give a palindrome (21212).

The spelling of 20425787 in words is "twenty million, four hundred twenty-five thousand, seven hundred eighty-seven".