20251984066 has 16 divisors (see below), whose sum is σ = 31043211264. Its totient is φ = 9904509504.

The previous prime is 20251984057. The next prime is 20251984099. The reversal of 20251984066 is 66048915202.

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, 91546 + ... + 221098.

It is an arithmetic number, because the mean of its divisors is an integer number (1940200704).

Almost surely, 2^20251984066 is an apocalyptic number.

20251984066 is a deficient number, since it is larger than the sum of its proper divisors (10791227198).

20251984066 is a wasteful number, since it uses less digits than its factorization.

20251984066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131265.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 20251984066 in words is "twenty billion, two hundred fifty-one million, nine hundred eighty-four thousand, sixty-six".