20778022 has 8 divisors (see below), whose sum is σ = 31190400. Its totient is φ = 10381224.

The previous prime is 20778019. The next prime is 20778071. The reversal of 20778022 is 22087702.

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

It is a congruent number.

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, 379 + ... + 6457.

It is an arithmetic number, because the mean of its divisors is an integer number (3898800).

Almost surely, 2^20778022 is an apocalyptic number.

20778022 is a deficient number, since it is larger than the sum of its proper divisors (10412378).

20778022 is a wasteful number, since it uses less digits than its factorization.

20778022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7790.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 20778022 is about 4558.2915659269. The cubic root of 20778022 is about 274.9168762543.

The spelling of 20778022 in words is "twenty million, seven hundred seventy-eight thousand, twenty-two".