20033149 has 4 divisors (see below), whose sum is σ = 20120860. Its totient is φ = 19945440.

The previous prime is 20033137. The next prime is 20033159. The reversal of 20033149 is 94133002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94133002 = 2 ⋅47066501.

It can be written as a sum of positive squares in 2 ways, for example, as 13089924 + 6943225 = 3618^2 + 2635^2 .

It is a cyclic number.

It is not a de Polignac number, because 20033149 - 2⁹ = 20032637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20033159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43512 + ... + 43969.

It is an arithmetic number, because the mean of its divisors is an integer number (5030215).

Almost surely, 2^20033149 is an apocalyptic number.

It is an amenable number.

20033149 is a deficient number, since it is larger than the sum of its proper divisors (87711).

20033149 is an equidigital number, since it uses as much as digits as its factorization.

20033149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87710.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 20033149 is about 4475.8405914420. The cubic root of 20033149 is about 271.5916459307.

The spelling of 20033149 in words is "twenty million, thirty-three thousand, one hundred forty-nine".