20826715904 has 36 divisors (see below), whose sum is σ = 42072988776. Its totient is φ = 10287885312.

The previous prime is 20826715849. The next prime is 20826715907. The reversal of 20826715904 is 40951762802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20826715907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468839 + ... + 511334.

Almost surely, 2^20826715904 is an apocalyptic number.

It is an amenable number.

20826715904 is an abundant number, since it is smaller than the sum of its proper divisors (21246272872).

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

20826715904 is an frugal number, since it uses more digits than its factorization.

20826715904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980272 (or 980258 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 20826715904 in words is "twenty billion, eight hundred twenty-six million, seven hundred fifteen thousand, nine hundred four".