20402626064 has 20 divisors (see below), whose sum is σ = 39532303104. Its totient is φ = 10200741408.

The previous prime is 20402626063. The next prime is 20402626067. The reversal of 20402626064 is 46062620402.

It is a self number, because there is not a number n which added to its sum of digits gives 20402626064.

It is not an unprimeable number, because it can be changed into a prime (20402626063) 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 3 ways as a sum of consecutive naturals, for example, 535289 + ... + 572135.

Almost surely, 2^20402626064 is an apocalyptic number.

It is an amenable number.

20402626064 is a deficient number, since it is larger than the sum of its proper divisors (19129677040).

20402626064 is a wasteful number, since it uses less digits than its factorization.

20402626064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71462 (or 71456 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 20402626064 in words is "twenty billion, four hundred two million, six hundred twenty-six thousand, sixty-four".