20412799786 has 16 divisors (see below), whose sum is σ = 30889121544. Its totient is φ = 10116808704.

The previous prime is 20412799753. The next prime is 20412799787. The reversal of 20412799786 is 68799721402.

It can be written as a sum of positive squares in 4 ways, for example, as 10489651561 + 9923148225 = 102419^2 + 99615^2 .

It is not an unprimeable number, because it can be changed into a prime (20412799787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11466 + ... + 202378.

Almost surely, 2^20412799786 is an apocalyptic number.

20412799786 is a deficient number, since it is larger than the sum of its proper divisors (10476321758).

20412799786 is a wasteful number, since it uses less digits than its factorization.

20412799786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191385.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 20412799786 in words is "twenty billion, four hundred twelve million, seven hundred ninety-nine thousand, seven hundred eighty-six".