20668498416 has 30 divisors (see below), whose sum is σ = 57843089720. Its totient is φ = 6889499424.

The previous prime is 20668498339. The next prime is 20668498427. The reversal of 20668498416 is 61489486602.

20668498416 is a `hidden beast` number, since 2 + 0 + 66 + 84 + 98 + 416 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71765476 + ... + 71765763.

Almost surely, 2^20668498416 is an apocalyptic number.

It is an amenable number.

20668498416 is an abundant number, since it is smaller than the sum of its proper divisors (37174591304).

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

20668498416 is a wasteful number, since it uses less digits than its factorization.

20668498416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143531253 (or 143531244 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 20668498416 in words is "twenty billion, six hundred sixty-eight million, four hundred ninety-eight thousand, four hundred sixteen".