20838412786 has 8 divisors (see below), whose sum is σ = 31293263340. Its totient is φ = 10407325008.

The previous prime is 20838412687. The next prime is 20838412787. The reversal of 20838412786 is 68721483802.

It can be written as a sum of positive squares in 2 ways, for example, as 20543775561 + 294637225 = 143331^2 + 17165^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20838412787) 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, 5938501 + ... + 5942008.

Almost surely, 2^20838412786 is an apocalyptic number.

20838412786 is a deficient number, since it is larger than the sum of its proper divisors (10454850554).

20838412786 is a wasteful number, since it uses less digits than its factorization.

20838412786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11881388.

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 20838412786 in words is "twenty billion, eight hundred thirty-eight million, four hundred twelve thousand, seven hundred eighty-six".