20026949 has 4 divisors (see below), whose sum is σ = 20492736. Its totient is φ = 19561164.

The previous prime is 20026939. The next prime is 20026957. The reversal of 20026949 is 94962002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94962002 = 2 ⋅47481001.

It is a cyclic number.

It is not a de Polignac number, because 20026949 - 2⁴ = 20026933 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 (20026939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232829 + ... + 232914.

It is an arithmetic number, because the mean of its divisors is an integer number (5123184).

Almost surely, 2^20026949 is an apocalyptic number.

It is an amenable number.

20026949 is a deficient number, since it is larger than the sum of its proper divisors (465787).

20026949 is an equidigital number, since it uses as much as digits as its factorization.

20026949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465786.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 20026949 is about 4475.1479305158. The cubic root of 20026949 is about 271.5636250082.

The spelling of 20026949 in words is "twenty million, twenty-six thousand, nine hundred forty-nine".