20222545 has 24 divisors (see below), whose sum is σ = 28728000. Its totient is φ = 13622112.

The previous prime is 20222473. The next prime is 20222557. The reversal of 20222545 is 54522202.

It is a happy number.

It is not a de Polignac number, because 20222545 - 2¹⁵ = 20189777 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13756 + ... + 15154.

It is an arithmetic number, because the mean of its divisors is an integer number (1197000).

Almost surely, 2^20222545 is an apocalyptic number.

It is an amenable number.

20222545 is a deficient number, since it is larger than the sum of its proper divisors (8505455).

20222545 is a wasteful number, since it uses less digits than its factorization.

20222545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477 (or 1470 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 20222545 is about 4496.9484097552. The cubic root of 20222545 is about 272.4448503830. Note that the first 3 decimals are identical.

Adding to 20222545 its reverse (54522202), we get a palindrome (74744747).

The spelling of 20222545 in words is "twenty million, two hundred twenty-two thousand, five hundred forty-five".