20788222 has 16 divisors (see below), whose sum is σ = 38378592. Its totient is φ = 8223840.

The previous prime is 20788219. The next prime is 20788247. The reversal of 20788222 is 22288702.

It is a happy number.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 56929 + ... + 57292.

It is an arithmetic number, because the mean of its divisors is an integer number (2398662).

Almost surely, 2^20788222 is an apocalyptic number.

20788222 is a deficient number, since it is larger than the sum of its proper divisors (17590370).

20788222 is a wasteful number, since it uses less digits than its factorization.

20788222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114243.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 20788222 is about 4559.4102688835. The cubic root of 20788222 is about 274.9618547642.

The spelling of 20788222 in words is "twenty million, seven hundred eighty-eight thousand, two hundred twenty-two".