20520035 has 4 divisors (see below), whose sum is σ = 24624048. Its totient is φ = 16416024.

The previous prime is 20520029. The next prime is 20520041. The reversal of 20520035 is 53002502.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20520029) and next prime (20520041).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20520035 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20519995 and 20520022.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051999 + ... + 2052008.

It is an arithmetic number, because the mean of its divisors is an integer number (6156012).

Almost surely, 2^20520035 is an apocalyptic number.

20520035 is a deficient number, since it is larger than the sum of its proper divisors (4104013).

20520035 is an equidigital number, since it uses as much as digits as its factorization.

20520035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104012.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 20520035 is about 4529.9045243802. The cubic root of 20520035 is about 273.7743137777.

Adding to 20520035 its reverse (53002502), we get a palindrome (73522537).

The spelling of 20520035 in words is "twenty million, five hundred twenty thousand, thirty-five".