20623643204 has 6 divisors (see below), whose sum is σ = 36091375614.
Its totient is φ = 10311821600.
The previous prime is 20623643153. The next prime is 20623643321. The reversal of 20623643204 is 40234632602.
It can be written as a sum of positive squares in only one way, i.e., 20428984900 + 194658304 = 142930^2 + 13952^2
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2577955397 + ... + 2577955404.
It is an arithmetic number, because the mean of its divisors is an integer number (6015229269).
Almost surely, 220623643204 is an apocalyptic number.
It is an amenable number.
20623643204 is a deficient number, since it is larger than the sum of its proper divisors (15467732410).
20623643204 is a wasteful number, since it uses less digits than its factorization.
20623643204 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5155910805 (or 5155910803 counting only the distinct ones).
The product of its (nonzero) digits is 41472, while the sum is 32.
The spelling of 20623643204 in words is "twenty billion, six hundred twenty-three million, six hundred forty-three thousand, two hundred four".