20693425 has 6 divisors (see below), whose sum is σ = 25659878. Its totient is φ = 16554720.

The previous prime is 20693423. The next prime is 20693459. The reversal of 20693425 is 52439602.

It can be written as a sum of positive squares in 3 ways, for example, as 3751969 + 16941456 = 1937^2 + 4116^2 .

It is not a de Polignac number, because 20693425 - 2¹ = 20693423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20693423) 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 in 5 ways as a sum of consecutive naturals, for example, 413844 + ... + 413893.

Almost surely, 2^20693425 is an apocalyptic number.

20693425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20693425 is a deficient number, since it is larger than the sum of its proper divisors (4966453).

20693425 is an equidigital number, since it uses as much as digits as its factorization.

20693425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827747 (or 827742 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 20693425 is about 4549.0026379416. The cubic root of 20693425 is about 274.5432638844.

The spelling of 20693425 in words is "twenty million, six hundred ninety-three thousand, four hundred twenty-five".