20422718 has 4 divisors (see below), whose sum is σ = 30634080. Its totient is φ = 10211358.

The previous prime is 20422697. The next prime is 20422723. The reversal of 20422718 is 81722402.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105678 + ... + 5105681.

It is an arithmetic number, because the mean of its divisors is an integer number (7658520).

Almost surely, 2^20422718 is an apocalyptic number.

20422718 is a deficient number, since it is larger than the sum of its proper divisors (10211362).

20422718 is a wasteful number, since it uses less digits than its factorization.

20422718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10211361.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 20422718 is about 4519.1501413429. The cubic root of 20422718 is about 273.3408329623.

It can be divided in two parts, 204 and 22718, that added together give a palindrome (22922).

The spelling of 20422718 in words is "twenty million, four hundred twenty-two thousand, seven hundred eighteen".