20102249 has 8 divisors (see below), whose sum is σ = 20856000. Its totient is φ = 19352592.

The previous prime is 20102239. The next prime is 20102263. The reversal of 20102249 is 94220102.

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 20102249 - 2⁴ = 20102233 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20102249.

It is not an unprimeable number, because it can be changed into a prime (20102219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11942 + ... + 13520.

It is an arithmetic number, because the mean of its divisors is an integer number (2607000).

Almost surely, 2^20102249 is an apocalyptic number.

20102249 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

20102249 is a deficient number, since it is larger than the sum of its proper divisors (753751).

20102249 is a wasteful number, since it uses less digits than its factorization.

20102249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047.

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

The square root of 20102249 is about 4483.5531668533. The cubic root of 20102249 is about 271.9035530676.

The spelling of 20102249 in words is "twenty million, one hundred two thousand, two hundred forty-nine".