20365780078 has 32 divisors (see below), whose sum is σ = 36762186240. Its totient is φ = 8266134240.

The previous prime is 20365780049. The next prime is 20365780081. The reversal of 20365780078 is 87008756302.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 950463 + ... + 971653.

It is an arithmetic number, because the mean of its divisors is an integer number (1148818320).

Almost surely, 2^20365780078 is an apocalyptic number.

20365780078 is a deficient number, since it is larger than the sum of its proper divisors (16396406162).

20365780078 is a wasteful number, since it uses less digits than its factorization.

20365780078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24832.

The product of its (nonzero) digits is 564480, while the sum is 46.

The spelling of 20365780078 in words is "twenty billion, three hundred sixty-five million, seven hundred eighty thousand, seventy-eight".