20953044 has 144 divisors (see below), whose sum is σ = 65939328. Its totient is φ = 5474304.

The previous prime is 20953019. The next prime is 20953081. The reversal of 20953044 is 44035902.

20953044 = T₃₂ + T₃₃ + ... + T₅₀₀.

It is a junction number, because it is equal to n+sod(n) for n = 20952999 and 20953017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 286992 + ... + 287064.

It is an arithmetic number, because the mean of its divisors is an integer number (457912).

Almost surely, 2^20953044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20953044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32969664).

20953044 is an abundant number, since it is smaller than the sum of its proper divisors (44986284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20953044 is a wasteful number, since it uses less digits than its factorization.

20953044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20953044 is about 4577.4495081868. The cubic root of 20953044 is about 275.6866323679.

Adding to 20953044 its reverse (44035902), we get a palindrome (64988946).

The spelling of 20953044 in words is "twenty million, nine hundred fifty-three thousand, forty-four".