20422546 has 4 divisors (see below), whose sum is σ = 30633822. Its totient is φ = 10211272.

The previous prime is 20422517. The next prime is 20422579. The reversal of 20422546 is 64522402.

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

It can be written as a sum of positive squares in only one way, i.e., 19018321 + 1404225 = 4361^2 + 1185^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20422546.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105635 + ... + 5105638.

Almost surely, 2^20422546 is an apocalyptic number.

20422546 is a deficient number, since it is larger than the sum of its proper divisors (10211276).

20422546 is a wasteful number, since it uses less digits than its factorization.

20422546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10211275.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 20422546 is about 4519.1311111761. The cubic root of 20422546 is about 273.3400656019.

Adding to 20422546 its reverse (64522402), we get a palindrome (84944948).

The spelling of 20422546 in words is "twenty million, four hundred twenty-two thousand, five hundred forty-six".