20201249 has 2 divisors, whose sum is σ = 20201250. Its totient is φ = 20201248.

The previous prime is 20201239. The next prime is 20201267. The reversal of 20201249 is 94210202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19864849 + 336400 = 4457^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201249 - 2⁸ = 20200993 is a prime.

It is a super-2 number, since 2×20201249² = 816180922320002, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20201249.

It is not a weakly prime, because it can be changed into another prime (20201239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100624 + 10100625.

It is an arithmetic number, because the mean of its divisors is an integer number (10100625).

Almost surely, 2^20201249 is an apocalyptic number.

It is an amenable number.

20201249 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201249 is an equidigital number, since it uses as much as digits as its factorization.

20201249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 20201249 is about 4494.5799581273. The cubic root of 20201249 is about 272.3491811949.

The spelling of 20201249 in words is "twenty million, two hundred one thousand, two hundred forty-nine".