20208428464 has 20 divisors (see below), whose sum is σ = 44747234704. Its totient is φ = 8660755008.

The previous prime is 20208428447. The next prime is 20208428477. The reversal of 20208428464 is 46482480202.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 90216087 + ... + 90216310.

Almost surely, 2^20208428464 is an apocalyptic number.

It is an amenable number.

20208428464 is an abundant number, since it is smaller than the sum of its proper divisors (24538806240).

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

20208428464 is a wasteful number, since it uses less digits than its factorization.

20208428464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180432412 (or 180432406 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 40.

The spelling of 20208428464 in words is "twenty billion, two hundred eight million, four hundred twenty-eight thousand, four hundred sixty-four".