20906335 has 4 divisors (see below), whose sum is σ = 25087608. Its totient is φ = 16725064.

The previous prime is 20906329. The next prime is 20906341. The reversal of 20906335 is 53360902.

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 (20906329) and next prime (20906341).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20906335 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 3 ways as a sum of consecutive naturals, for example, 2090629 + ... + 2090638.

It is an arithmetic number, because the mean of its divisors is an integer number (6271902).

Almost surely, 2^20906335 is an apocalyptic number.

20906335 is a deficient number, since it is larger than the sum of its proper divisors (4181273).

20906335 is an equidigital number, since it uses as much as digits as its factorization.

20906335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4181272.

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 20906335 is about 4572.3445845649. The cubic root of 20906335 is about 275.4816243290.

The spelling of 20906335 in words is "twenty million, nine hundred six thousand, three hundred thirty-five".