20306665772 has 12 divisors (see below), whose sum is σ = 35546461440. Its totient is φ = 10150533936.

The previous prime is 20306665759. The next prime is 20306665787. The reversal of 20306665772 is 27756660302.

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 3 ways as a sum of consecutive naturals, for example, 683372 + ... + 712467.

It is an arithmetic number, because the mean of its divisors is an integer number (2962205120).

Almost surely, 2^20306665772 is an apocalyptic number.

It is an amenable number.

20306665772 is a deficient number, since it is larger than the sum of its proper divisors (15239795668).

20306665772 is a wasteful number, since it uses less digits than its factorization.

20306665772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399480 (or 1399478 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 44.

The spelling of 20306665772 in words is "twenty billion, three hundred six million, six hundred sixty-five thousand, seven hundred seventy-two".