20035557 has 12 divisors (see below), whose sum is σ = 30463680. Its totient is φ = 12653928.

The previous prime is 20035541. The next prime is 20035559. The reversal of 20035557 is 75553002.

It is not a de Polignac number, because 20035557 - 2⁴ = 20035541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20035557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20035559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58413 + ... + 58754.

It is an arithmetic number, because the mean of its divisors is an integer number (2538640).

Almost surely, 2^20035557 is an apocalyptic number.

It is an amenable number.

20035557 is a deficient number, since it is larger than the sum of its proper divisors (10428123).

20035557 is a wasteful number, since it uses less digits than its factorization.

20035557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117192 (or 117189 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 27.

The square root of 20035557 is about 4476.1095831090. The cubic root of 20035557 is about 271.6025273367.

Adding to 20035557 its reverse (75553002), we get a palindrome (95588559).

The spelling of 20035557 in words is "twenty million, thirty-five thousand, five hundred fifty-seven".