20664321452 has 12 divisors (see below), whose sum is σ = 36163624896. Its totient is φ = 10331857200.

The previous prime is 20664321449. The next prime is 20664321463. The reversal of 20664321452 is 25412346602.

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, 156098 + ... + 256310.

It is an arithmetic number, because the mean of its divisors is an integer number (3013635408).

Almost surely, 2^20664321452 is an apocalyptic number.

It is an amenable number.

20664321452 is a deficient number, since it is larger than the sum of its proper divisors (15499303444).

20664321452 is a wasteful number, since it uses less digits than its factorization.

20664321452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151768 (or 151766 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 20664321452 in words is "twenty billion, six hundred sixty-four million, three hundred twenty-one thousand, four hundred fifty-two".