20506278466 has 8 divisors (see below), whose sum is σ = 32378334480. Its totient is φ = 9713500308.

The previous prime is 20506278461. The next prime is 20506278469. The reversal of 20506278466 is 66487260502.

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

It is not an unprimeable number, because it can be changed into a prime (20506278461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269819416 + ... + 269819491.

It is an arithmetic number, because the mean of its divisors is an integer number (4047291810).

Almost surely, 2^20506278466 is an apocalyptic number.

20506278466 is a deficient number, since it is larger than the sum of its proper divisors (11872056014).

20506278466 is a wasteful number, since it uses less digits than its factorization.

20506278466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539638928.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 20506278466 in words is "twenty billion, five hundred six million, two hundred seventy-eight thousand, four hundred sixty-six".