20026664 has 16 divisors (see below), whose sum is σ = 42914400. Its totient is φ = 8582832.

The previous prime is 20026639. The next prime is 20026673. The reversal of 20026664 is 46662002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178754 + ... + 178865.

It is an arithmetic number, because the mean of its divisors is an integer number (2682150).

Almost surely, 2^20026664 is an apocalyptic number.

It is an amenable number.

20026664 is an abundant number, since it is smaller than the sum of its proper divisors (22887736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20026664 is a wasteful number, since it uses less digits than its factorization.

20026664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357632 (or 357628 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 20026664 is about 4475.1160878797. The cubic root of 20026664 is about 271.5623368106.

Adding to 20026664 its reverse (46662002), we get a palindrome (66688666).

The spelling of 20026664 in words is "twenty million, twenty-six thousand, six hundred sixty-four".