20426668 has 12 divisors (see below), whose sum is σ = 37301040. Its totient is φ = 9769232.

The previous prime is 20426647. The next prime is 20426689. The reversal of 20426668 is 86662402.

It is an interprime number because it is at equal distance from previous prime (20426647) and next prime (20426689).

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, 110923 + ... + 111106.

It is an arithmetic number, because the mean of its divisors is an integer number (3108420).

Almost surely, 2^20426668 is an apocalyptic number.

It is an amenable number.

20426668 is a deficient number, since it is larger than the sum of its proper divisors (16874372).

20426668 is a wasteful number, since it uses less digits than its factorization.

20426668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222056 (or 222054 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 20426668 is about 4519.5871492870. The cubic root of 20426668 is about 273.3584542977.

The spelling of 20426668 in words is "twenty million, four hundred twenty-six thousand, six hundred sixty-eight".