20553005 has 16 divisors (see below), whose sum is σ = 27152064. Its totient is φ = 14810880.

The previous prime is 20552999. The next prime is 20553023. The reversal of 20553005 is 50035502.

It is not a de Polignac number, because 20553005 - 2⁴ = 20552989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4562 + ... + 7868.

It is an arithmetic number, because the mean of its divisors is an integer number (1697004).

Almost surely, 2^20553005 is an apocalyptic number.

It is an amenable number.

20553005 is a deficient number, since it is larger than the sum of its proper divisors (6599059).

20553005 is a wasteful number, since it uses less digits than its factorization.

20553005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3436.

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 20553005 is about 4533.5422133250. The cubic root of 20553005 is about 273.9208617597.

Adding to 20553005 its reverse (50035502), we get a palindrome (70588507).

The spelling of 20553005 in words is "twenty million, five hundred fifty-three thousand, five".