20760273778 has 4 divisors (see below), whose sum is σ = 31140410670. Its totient is φ = 10380136888.

The previous prime is 20760273769. The next prime is 20760273799. The reversal of 20760273778 is 87737206702.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11677611969 + 9082661809 = 108063^2 + 95303^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5190068443 + ... + 5190068446.

Almost surely, 2^20760273778 is an apocalyptic number.

20760273778 is a deficient number, since it is larger than the sum of its proper divisors (10380136892).

20760273778 is a wasteful number, since it uses less digits than its factorization.

20760273778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10380136891.

The product of its (nonzero) digits is 1382976, while the sum is 49.

The spelling of 20760273778 in words is "twenty billion, seven hundred sixty million, two hundred seventy-three thousand, seven hundred seventy-eight".