20659426 has 8 divisors (see below), whose sum is σ = 32057820. Its totient is φ = 9973488.

The previous prime is 20659421. The next prime is 20659427. The reversal of 20659426 is 62495602.

It can be written as a sum of positive squares in 2 ways, for example, as 20657025 + 2401 = 4545^2 + 49^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20659391 and 20659400.

It is not an unprimeable number, because it can be changed into a prime (20659421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178041 + ... + 178156.

Almost surely, 2^20659426 is an apocalyptic number.

20659426 is a deficient number, since it is larger than the sum of its proper divisors (11398394).

20659426 is a wasteful number, since it uses less digits than its factorization.

20659426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356228.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 20659426 is about 4545.2641287388. The cubic root of 20659426 is about 274.3928245849.

The spelling of 20659426 in words is "twenty million, six hundred fifty-nine thousand, four hundred twenty-six".