20622172 has 12 divisors (see below), whose sum is σ = 37064440. Its totient is φ = 10032336.

The previous prime is 20622169. The next prime is 20622181. The reversal of 20622172 is 27122602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69522 + ... + 69817.

Almost surely, 2^20622172 is an apocalyptic number.

It is an amenable number.

20622172 is a deficient number, since it is larger than the sum of its proper divisors (16442268).

20622172 is a wasteful number, since it uses less digits than its factorization.

20622172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139380 (or 139378 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 20622172 is about 4541.1641679199. The cubic root of 20622172 is about 274.2277928807.

Adding to 20622172 its reverse (27122602), we get a palindrome (47744774).

The spelling of 20622172 in words is "twenty million, six hundred twenty-two thousand, one hundred seventy-two".