20730719378 has 4 divisors (see below), whose sum is σ = 31096079070. Its totient is φ = 10365359688.

The previous prime is 20730719369. The next prime is 20730719393. The reversal of 20730719378 is 87391703702.

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., 16314186529 + 4416532849 = 127727^2 + 66457^2 .

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, 5182679843 + ... + 5182679846.

Almost surely, 2^20730719378 is an apocalyptic number.

20730719378 is a deficient number, since it is larger than the sum of its proper divisors (10365359692).

20730719378 is a wasteful number, since it uses less digits than its factorization.

20730719378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10365359691.

The product of its (nonzero) digits is 444528, while the sum is 47.

The spelling of 20730719378 in words is "twenty billion, seven hundred thirty million, seven hundred nineteen thousand, three hundred seventy-eight".