20668862426 has 8 divisors (see below), whose sum is σ = 32072372820. Its totient is φ = 9978071488.

The previous prime is 20668862413. The next prime is 20668862443. The reversal of 20668862426 is 62426886602.

It can be written as a sum of positive squares in 2 ways, for example, as 20608038025 + 60824401 = 143555^2 + 7799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 178179791 + ... + 178179906.

Almost surely, 2^20668862426 is an apocalyptic number.

20668862426 is a deficient number, since it is larger than the sum of its proper divisors (11403510394).

20668862426 is a wasteful number, since it uses less digits than its factorization.

20668862426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356359728.

The product of its (nonzero) digits is 2654208, while the sum is 50.

The spelling of 20668862426 in words is "twenty billion, six hundred sixty-eight million, eight hundred sixty-two thousand, four hundred twenty-six".