20778214442 has 8 divisors (see below), whose sum is σ = 32172719232. Its totient is φ = 10053974700.

The previous prime is 20778214441. The next prime is 20778214447. The reversal of 20778214442 is 24441287702.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20778214442.

It is not an unprimeable number, because it can be changed into a prime (20778214441) 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, 167566184 + ... + 167566307.

It is an arithmetic number, because the mean of its divisors is an integer number (4021589904).

Almost surely, 2^20778214442 is an apocalyptic number.

20778214442 is a deficient number, since it is larger than the sum of its proper divisors (11394504790).

20778214442 is a wasteful number, since it uses less digits than its factorization.

20778214442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335132524.

The product of its (nonzero) digits is 200704, while the sum is 41.

The spelling of 20778214442 in words is "twenty billion, seven hundred seventy-eight million, two hundred fourteen thousand, four hundred forty-two".