20422545 has 32 divisors (see below), whose sum is σ = 38392704. Its totient is φ = 9139200.

The previous prime is 20422517. The next prime is 20422579. The reversal of 20422545 is 54522402.

It is a happy number.

It is not a de Polignac number, because 20422545 - 2⁵ = 20422513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2616 + ... + 6905.

It is an arithmetic number, because the mean of its divisors is an integer number (1199772).

Almost surely, 2^20422545 is an apocalyptic number.

It is an amenable number.

20422545 is a deficient number, since it is larger than the sum of its proper divisors (17970159).

20422545 is a wasteful number, since it uses less digits than its factorization.

20422545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9553.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20422545 is about 4519.1310005354. The cubic root of 20422545 is about 273.3400611405.

Adding to 20422545 its reverse (54522402), we get a palindrome (74944947).

The spelling of 20422545 in words is "twenty million, four hundred twenty-two thousand, five hundred forty-five".