20233649 has 2 divisors, whose sum is σ = 20233650. Its totient is φ = 20233648.

The previous prime is 20233643. The next prime is 20233663. The reversal of 20233649 is 94633202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14440000 + 5793649 = 3800^2 + 2407^2 .

It is a cyclic number.

It is not a de Polignac number, because 20233649 - 2¹² = 20229553 is a prime.

It is a super-3 number, since 3×20233649³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20233643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10116824 + 10116825.

It is an arithmetic number, because the mean of its divisors is an integer number (10116825).

Almost surely, 2^20233649 is an apocalyptic number.

It is an amenable number.

20233649 is a deficient number, since it is larger than the sum of its proper divisors (1).

20233649 is an equidigital number, since it uses as much as digits as its factorization.

20233649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 20233649 is about 4498.1828553317. The cubic root of 20233649 is about 272.4947068523.

The spelling of 20233649 in words is "twenty million, two hundred thirty-three thousand, six hundred forty-nine".