20042275 has 24 divisors (see below), whose sum is σ = 27998208. Its totient is φ = 14100000.

The previous prime is 20042273. The next prime is 20042279. The reversal of 20042275 is 57224002.

It is not a de Polignac number, because 20042275 - 2¹ = 20042273 is a prime.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20042273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7350 + ... + 9700.

It is an arithmetic number, because the mean of its divisors is an integer number (1166592).

Almost surely, 2^20042275 is an apocalyptic number.

20042275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20042275 is a deficient number, since it is larger than the sum of its proper divisors (7955933).

20042275 is a wasteful number, since it uses less digits than its factorization.

20042275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403 (or 2398 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 20042275 is about 4476.8599486694. The cubic root of 20042275 is about 271.6328804048.

Adding to 20042275 its reverse (57224002), we get a palindrome (77266277).

The spelling of 20042275 in words is "twenty million, forty-two thousand, two hundred seventy-five".