20520233 has 12 divisors (see below), whose sum is σ = 21496464. Its totient is φ = 19585800.

The previous prime is 20520229. The next prime is 20520257. The reversal of 20520233 is 33202502.

It is not a de Polignac number, because 20520233 - 2² = 20520229 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20520263) 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, 125810 + ... + 125972.

It is an arithmetic number, because the mean of its divisors is an integer number (1791372).

Almost surely, 2^20520233 is an apocalyptic number.

It is an amenable number.

20520233 is a deficient number, since it is larger than the sum of its proper divisors (976231).

20520233 is a wasteful number, since it uses less digits than its factorization.

20520233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 20520233 is about 4529.9263790927. The cubic root of 20520233 is about 273.7751943340.

Adding to 20520233 its reverse (33202502), we get a palindrome (53722735).

The spelling of 20520233 in words is "twenty million, five hundred twenty thousand, two hundred thirty-three".