20090835 has 40 divisors (see below), whose sum is σ = 36416160. Its totient is φ = 10596096.

The previous prime is 20090827. The next prime is 20090839. The reversal of 20090835 is 53809002.

It is not a de Polignac number, because 20090835 - 2³ = 20090827 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20090799 and 20090808.

It is not an unprimeable number, because it can be changed into a prime (20090839) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 45546 + ... + 45984.

It is an arithmetic number, because the mean of its divisors is an integer number (910404).

Almost surely, 2^20090835 is an apocalyptic number.

20090835 is a deficient number, since it is larger than the sum of its proper divisors (16325325).

20090835 is a wasteful number, since it uses less digits than its factorization.

20090835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20090835 is about 4482.2801117289. The cubic root of 20090835 is about 271.8520813023.

Adding to 20090835 its reverse (53809002), we get a palindrome (73899837).

The spelling of 20090835 in words is "twenty million, ninety thousand, eight hundred thirty-five".