20522246 has 4 divisors (see below), whose sum is σ = 30783372. Its totient is φ = 10261122.

The previous prime is 20522239. The next prime is 20522251. The reversal of 20522246 is 64222502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64222502 = 2 ⋅32111251.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5130560 + ... + 5130563.

It is an arithmetic number, because the mean of its divisors is an integer number (7695843).

Almost surely, 2^20522246 is an apocalyptic number.

20522246 is a deficient number, since it is larger than the sum of its proper divisors (10261126).

20522246 is a wasteful number, since it uses less digits than its factorization.

20522246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10261125.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20522246 is about 4530.1485626853. The cubic root of 20522246 is about 273.7841463351.

Adding to 20522246 its reverse (64222502), we get a palindrome (84744748).

The spelling of 20522246 in words is "twenty million, five hundred twenty-two thousand, two hundred forty-six".