20066988964 has 81 divisors (see below), whose sum is σ = 39728655169. Its totient is φ = 8862124480.

The previous prime is 20066988911. The next prime is 20066988979. The reversal of 20066988964 is 46988966002.

The square root of 20066988964 is 141658.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 11787444900 + 8279544064 = 108570^2 + 90992^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20066988899 and 20066988908.

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 26 ways as a sum of consecutive naturals, for example, 146474304 + ... + 146474440.

Almost surely, 2^20066988964 is an apocalyptic number.

20066988964 is the 141658-th square number.

It is an amenable number.

20066988964 is a deficient number, since it is larger than the sum of its proper divisors (19661666205).

20066988964 is a wasteful number, since it uses less digits than its factorization.

20066988964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 58.

The spelling of 20066988964 in words is "twenty billion, sixty-six million, nine hundred eighty-eight thousand, nine hundred sixty-four".