20221045 has 16 divisors (see below), whose sum is σ = 26691840. Its totient is φ = 14612544.

The previous prime is 20221027. The next prime is 20221049. The reversal of 20221045 is 54012202.

It is a cyclic number.

It is not a de Polignac number, because 20221045 - 2¹³ = 20212853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255 + ... + 6364.

It is an arithmetic number, because the mean of its divisors is an integer number (1668240).

Almost surely, 2^20221045 is an apocalyptic number.

It is an amenable number.

20221045 is a deficient number, since it is larger than the sum of its proper divisors (6470795).

20221045 is a wasteful number, since it uses less digits than its factorization.

20221045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6684.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20221045 is about 4496.7816268972. The cubic root of 20221045 is about 272.4381140502.

Adding to 20221045 its reverse (54012202), we get a palindrome (74233247).

The spelling of 20221045 in words is "twenty million, two hundred twenty-one thousand, forty-five".