20290188304 has 10 divisors (see below), whose sum is σ = 39312239870. Its totient is φ = 10145094144.

The previous prime is 20290188283. The next prime is 20290188307. The reversal of 20290188304 is 40388109202.

It can be written as a sum of positive squares in only one way, i.e., 11246178304 + 9044010000 = 106048^2 + 95100^2 .

It is not an unprimeable number, because it can be changed into a prime (20290188307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634068369 + ... + 634068400.

It is an arithmetic number, because the mean of its divisors is an integer number (3931223987).

Almost surely, 2^20290188304 is an apocalyptic number.

It is an amenable number.

20290188304 is a deficient number, since it is larger than the sum of its proper divisors (19022051566).

20290188304 is a wasteful number, since it uses less digits than its factorization.

20290188304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268136777 (or 1268136771 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The spelling of 20290188304 in words is "twenty billion, two hundred ninety million, one hundred eighty-eight thousand, three hundred four".