20948589218 has 32 divisors (see below), whose sum is σ = 33620033664. Its totient is φ = 9755360512.

The previous prime is 20948589217. The next prime is 20948589257. The reversal of 20948589218 is 81298584902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20948589217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1280780 + ... + 1297032.

It is an arithmetic number, because the mean of its divisors is an integer number (1050626052).

Almost surely, 2^20948589218 is an apocalyptic number.

20948589218 is a deficient number, since it is larger than the sum of its proper divisors (12671444446).

20948589218 is a wasteful number, since it uses less digits than its factorization.

20948589218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16666.

The product of its (nonzero) digits is 3317760, while the sum is 56.

The spelling of 20948589218 in words is "twenty billion, nine hundred forty-eight million, five hundred eighty-nine thousand, two hundred eighteen".