20078363786 has 16 divisors (see below), whose sum is σ = 32513598600. Its totient is φ = 9244274688.

The previous prime is 20078363783. The next prime is 20078363801. The reversal of 20078363786 is 68736387002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 17270953561 + 2807410225 = 131419^2 + 52985^2 .

It is not an unprimeable number, because it can be changed into a prime (20078363783) 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, 933431 + ... + 954698.

Almost surely, 2^20078363786 is an apocalyptic number.

20078363786 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20078363786 is a deficient number, since it is larger than the sum of its proper divisors (12435234814).

20078363786 is a wasteful number, since it uses less digits than its factorization.

20078363786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888553.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The spelling of 20078363786 in words is "twenty billion, seventy-eight million, three hundred sixty-three thousand, seven hundred eighty-six".