20622345 has 16 divisors (see below), whose sum is σ = 33220800. Its totient is φ = 10923584.

The previous prime is 20622341. The next prime is 20622361. The reversal of 20622345 is 54322602.

It is a cyclic number.

It is not a de Polignac number, because 20622345 - 2² = 20622341 is a prime.

It is a super-2 number, since 2×20622345² = 850562226598050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20622341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2379 + ... + 6848.

It is an arithmetic number, because the mean of its divisors is an integer number (2076300).

Almost surely, 2^20622345 is an apocalyptic number.

It is an amenable number.

20622345 is a deficient number, since it is larger than the sum of its proper divisors (12598455).

20622345 is a wasteful number, since it uses less digits than its factorization.

20622345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9384.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20622345 is about 4541.1832158591. The cubic root of 20622345 is about 274.2285597135.

Adding to 20622345 its reverse (54322602), we get a palindrome (74944947).

The spelling of 20622345 in words is "twenty million, six hundred twenty-two thousand, three hundred forty-five".