20201864667 has 16 divisors (see below), whose sum is σ = 27938208000. Its totient is φ = 12969167904.

The previous prime is 20201864647. The next prime is 20201864671. The reversal of 20201864667 is 76646810202.

It is not a de Polignac number, because 20201864667 - 2⁶ = 20201864603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20201864647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273367 + ... + 339312.

It is an arithmetic number, because the mean of its divisors is an integer number (1746138000).

Almost surely, 2^20201864667 is an apocalyptic number.

20201864667 is a deficient number, since it is larger than the sum of its proper divisors (7736343333).

20201864667 is a wasteful number, since it uses less digits than its factorization.

20201864667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613090.

The product of its (nonzero) digits is 193536, while the sum is 42.

The spelling of 20201864667 in words is "twenty billion, two hundred one million, eight hundred sixty-four thousand, six hundred sixty-seven".