20778122 has 8 divisors (see below), whose sum is σ = 32172672. Its totient is φ = 10053900.

The previous prime is 20778113. The next prime is 20778139. The reversal of 20778122 is 22187702.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167504 + ... + 167627.

It is an arithmetic number, because the mean of its divisors is an integer number (4021584).

Almost surely, 2^20778122 is an apocalyptic number.

20778122 is a deficient number, since it is larger than the sum of its proper divisors (11394550).

20778122 is a wasteful number, since it uses less digits than its factorization.

20778122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335164.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 20778122 is about 4558.3025349356. The cubic root of 20778122 is about 274.9173172915.

The spelling of 20778122 in words is "twenty million, seven hundred seventy-eight thousand, one hundred twenty-two".