20628689486 has 16 divisors (see below), whose sum is σ = 31026854304. Its totient is φ = 10286442144.

The previous prime is 20628689479. The next prime is 20628689503. The reversal of 20628689486 is 68498682602.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1196600 + ... + 1213716.

It is an arithmetic number, because the mean of its divisors is an integer number (1939178394).

Almost surely, 2^20628689486 is an apocalyptic number.

20628689486 is a deficient number, since it is larger than the sum of its proper divisors (10398164818).

20628689486 is a wasteful number, since it uses less digits than its factorization.

20628689486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18715.

The product of its (nonzero) digits is 15925248, while the sum is 59.

The spelling of 20628689486 in words is "twenty billion, six hundred twenty-eight million, six hundred eighty-nine thousand, four hundred eighty-six".