20220045 has 32 divisors (see below), whose sum is σ = 33264000. Its totient is φ = 10485504.

The previous prime is 20220041. The next prime is 20220049. The reversal of 20220045 is 54002202.

It is an interprime number because it is at equal distance from previous prime (20220041) and next prime (20220049).

It is not a de Polignac number, because 20220045 - 2² = 20220041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135631 + ... + 135779.

It is an arithmetic number, because the mean of its divisors is an integer number (1039500).

Almost surely, 2^20220045 is an apocalyptic number.

It is an amenable number.

20220045 is a deficient number, since it is larger than the sum of its proper divisors (13043955).

20220045 is a wasteful number, since it uses less digits than its factorization.

20220045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20220045 is about 4496.6704348885. The cubic root of 20220045 is about 272.4336229766.

Adding to 20220045 its reverse (54002202), we get a palindrome (74222247).

The spelling of 20220045 in words is "twenty million, two hundred twenty thousand, forty-five".