20013233 has 8 divisors (see below), whose sum is σ = 21335400. Its totient is φ = 18707200.

The previous prime is 20013223. The next prime is 20013239. The reversal of 20013233 is 33231002.

20013233 = 1077² + 1078² + ... + 1093².

It can be written as a sum of positive squares in 4 ways, for example, as 3301489 + 16711744 = 1817^2 + 4088^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20013233 - 2¹² = 20009137 is a prime.

It is a super-2 number, since 2×20013233² = 801058990224578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20013239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1418 + ... + 6483.

It is an arithmetic number, because the mean of its divisors is an integer number (2666925).

Almost surely, 2^20013233 is an apocalyptic number.

It is an amenable number.

20013233 is a deficient number, since it is larger than the sum of its proper divisors (1322167).

20013233 is a wasteful number, since it uses less digits than its factorization.

20013233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8067.

The product of its (nonzero) digits is 108, while the sum is 14.

The square root of 20013233 is about 4473.6152047310. The cubic root of 20013233 is about 271.5016149413.

Adding to 20013233 its reverse (33231002), we get a palindrome (53244235).

The spelling of 20013233 in words is "twenty million, thirteen thousand, two hundred thirty-three".