20251233 has 12 divisors (see below), whose sum is σ = 30972708. Its totient is φ = 12706560.

The previous prime is 20251229. The next prime is 20251241. The reversal of 20251233 is 33215202.

It can be written as a sum of positive squares in 2 ways, for example, as 16378209 + 3873024 = 4047^2 + 1968^2 .

It is not a de Polignac number, because 20251233 - 2² = 20251229 is a prime.

It is a super-2 number, since 2×20251233² = 820224876040578, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20251223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66028 + ... + 66333.

It is an arithmetic number, because the mean of its divisors is an integer number (2581059).

Almost surely, 2^20251233 is an apocalyptic number.

It is an amenable number.

20251233 is a deficient number, since it is larger than the sum of its proper divisors (10721475).

20251233 is a wasteful number, since it uses less digits than its factorization.

20251233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132384 (or 132381 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20251233 is about 4500.1369979146. The cubic root of 20251233 is about 272.5736209352.

Adding to 20251233 its reverse (33215202), we get a palindrome (53466435).

The spelling of 20251233 in words is "twenty million, two hundred fifty-one thousand, two hundred thirty-three".