20029782798 has 24 divisors (see below), whose sum is σ = 43402084128. Its totient is φ = 6675944832.

The previous prime is 20029782793. The next prime is 20029782811. The reversal of 20029782798 is 89728792002.

20029782798 is a `hidden beast` number, since 200 + 297 + 82 + 79 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20029782793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158686 + ... + 255422.

It is an arithmetic number, because the mean of its divisors is an integer number (1808420172).

Almost surely, 2^20029782798 is an apocalyptic number.

20029782798 is an abundant number, since it is smaller than the sum of its proper divisors (23372301330).

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

20029782798 is a wasteful number, since it uses less digits than its factorization.

20029782798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108248 (or 108245 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 20029782798 in words is "twenty billion, twenty-nine million, seven hundred eighty-two thousand, seven hundred ninety-eight".