20553435 has 48 divisors (see below), whose sum is σ = 41333760. Its totient is φ = 9253440.

The previous prime is 20553433. The next prime is 20553443. The reversal of 20553435 is 53435502.

It is not a de Polignac number, because 20553435 - 2¹ = 20553433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20553399 and 20553408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553433) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21906 + ... + 22824.

It is an arithmetic number, because the mean of its divisors is an integer number (861120).

Almost surely, 2^20553435 is an apocalyptic number.

20553435 is an abundant number, since it is smaller than the sum of its proper divisors (20780325).

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

20553435 is a wasteful number, since it uses less digits than its factorization.

20553435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 20553435 is about 4533.5896373624. The cubic root of 20553435 is about 273.9227720262.

Adding to 20553435 its reverse (53435502), we get a palindrome (73988937).

The spelling of 20553435 in words is "twenty million, five hundred fifty-three thousand, four hundred thirty-five".