20426464 has 12 divisors (see below), whose sum is σ = 40214664. Its totient is φ = 10213216.

The previous prime is 20426459. The next prime is 20426473. The reversal of 20426464 is 46462402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319132 + ... + 319195.

It is an arithmetic number, because the mean of its divisors is an integer number (3351222).

Almost surely, 2^20426464 is an apocalyptic number.

It is an amenable number.

20426464 is a deficient number, since it is larger than the sum of its proper divisors (19788200).

20426464 is an equidigital number, since it uses as much as digits as its factorization.

20426464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638337 (or 638329 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 20426464 is about 4519.5645807976. The cubic root of 20426464 is about 273.3575442894.

Adding to 20426464 its reverse (46462402), we get a palindrome (66888866).

The spelling of 20426464 in words is "twenty million, four hundred twenty-six thousand, four hundred sixty-four".