20902135 has 8 divisors (see below), whose sum is σ = 25139520. Its totient is φ = 16683744.

The previous prime is 20902121. The next prime is 20902159. The reversal of 20902135 is 53120902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20902135 - 2⁵ = 20902103 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2200 + ... + 6829.

It is an arithmetic number, because the mean of its divisors is an integer number (3142440).

Almost surely, 2^20902135 is an apocalyptic number.

20902135 is a deficient number, since it is larger than the sum of its proper divisors (4237385).

20902135 is an equidigital number, since it uses as much as digits as its factorization.

20902135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9497.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 20902135 is about 4571.8852785257. The cubic root of 20902135 is about 275.4631753706.

It can be divided in two parts, 2090 and 2135, that added together give a square (4225 = 65²).

The spelling of 20902135 in words is "twenty million, nine hundred two thousand, one hundred thirty-five".