20664345234 has 16 divisors (see below), whose sum is σ = 44507820672. Its totient is φ = 6358260048.

The previous prime is 20664345227. The next prime is 20664345263. The reversal of 20664345234 is 43254346602.

It is a super-6 number, since 6×20664345234⁶ (a number of 63 digits) contains 666666 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 20664345192 and 20664345201.

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 7 ways as a sum of consecutive naturals, for example, 132463674 + ... + 132463829.

It is an arithmetic number, because the mean of its divisors is an integer number (2781738792).

Almost surely, 2^20664345234 is an apocalyptic number.

20664345234 is an abundant number, since it is smaller than the sum of its proper divisors (23843475438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20664345234 is a wasteful number, since it uses less digits than its factorization.

20664345234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264927521.

The product of its (nonzero) digits is 414720, while the sum is 39.

The spelling of 20664345234 in words is "twenty billion, six hundred sixty-four million, three hundred forty-five thousand, two hundred thirty-four".