20650426 has 4 divisors (see below), whose sum is σ = 30975642. Its totient is φ = 10325212.

The previous prime is 20650423. The next prime is 20650439. The reversal of 20650426 is 62405602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15610401 + 5040025 = 3951^2 + 2245^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20650426.

It is not an unprimeable number, because it can be changed into a prime (20650423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5162605 + ... + 5162608.

Almost surely, 2^20650426 is an apocalyptic number.

20650426 is a deficient number, since it is larger than the sum of its proper divisors (10325216).

20650426 is a wasteful number, since it uses less digits than its factorization.

20650426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10325215.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 20650426 is about 4544.2739794163. The cubic root of 20650426 is about 274.3529736211.

The spelling of 20650426 in words is "twenty million, six hundred fifty thousand, four hundred twenty-six".