20534045 has 16 divisors (see below), whose sum is σ = 29818368. Its totient is φ = 13251840.

The previous prime is 20534039. The next prime is 20534051. The reversal of 20534045 is 54043502.

It is an interprime number because it is at equal distance from previous prime (20534039) and next prime (20534051).

It is not a de Polignac number, because 20534045 - 2⁴ = 20534029 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20534045.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16661 + ... + 17850.

It is an arithmetic number, because the mean of its divisors is an integer number (1863648).

Almost surely, 2^20534045 is an apocalyptic number.

It is an amenable number.

20534045 is a deficient number, since it is larger than the sum of its proper divisors (9284323).

20534045 is a wasteful number, since it uses less digits than its factorization.

20534045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34540.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 20534045 is about 4531.4506507299. The cubic root of 20534045 is about 273.8366058345.

Adding to 20534045 its reverse (54043502), we get a palindrome (74577547).

The spelling of 20534045 in words is "twenty million, five hundred thirty-four thousand, forty-five".