20426489668 has 24 divisors (see below), whose sum is σ = 38587993920. Its totient is φ = 9405100320.

The previous prime is 20426489659. The next prime is 20426489717. The reversal of 20426489668 is 86698462402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446968 + ... + 490543.

It is an arithmetic number, because the mean of its divisors is an integer number (1607833080).

Almost surely, 2^20426489668 is an apocalyptic number.

It is an amenable number.

20426489668 is a deficient number, since it is larger than the sum of its proper divisors (18161504252).

20426489668 is a wasteful number, since it uses less digits than its factorization.

20426489668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937947 (or 937945 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 55.

The spelling of 20426489668 in words is "twenty billion, four hundred twenty-six million, four hundred eighty-nine thousand, six hundred sixty-eight".