20426417 has 4 divisors (see below), whose sum is σ = 22283376. Its totient is φ = 18569460.

The previous prime is 20426389. The next prime is 20426423. The reversal of 20426417 is 71462402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20426417 - 2¹⁶ = 20360881 is a prime.

It is a super-2 number, since 2×20426417² = 834477022915778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20426447) 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, 928463 + ... + 928484.

It is an arithmetic number, because the mean of its divisors is an integer number (5570844).

Almost surely, 2^20426417 is an apocalyptic number.

It is an amenable number.

20426417 is a deficient number, since it is larger than the sum of its proper divisors (1856959).

20426417 is a wasteful number, since it uses less digits than its factorization.

20426417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856958.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 20426417 is about 4519.5593811787. The cubic root of 20426417 is about 273.3573346298.

Adding to 20426417 its reverse (71462402), we get a palindrome (91888819).

The spelling of 20426417 in words is "twenty million, four hundred twenty-six thousand, four hundred seventeen".