20425135 has 8 divisors (see below), whose sum is σ = 25355520. Its totient is φ = 15776544.

The previous prime is 20425121. The next prime is 20425159. The reversal of 20425135 is 53152402.

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 20425135 - 2⁵ = 20425103 is a prime.

It is a super-2 number, since 2×20425135² = 834372279536450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70287 + ... + 70576.

It is an arithmetic number, because the mean of its divisors is an integer number (3169440).

Almost surely, 2^20425135 is an apocalyptic number.

20425135 is a deficient number, since it is larger than the sum of its proper divisors (4930385).

20425135 is a wasteful number, since it uses less digits than its factorization.

20425135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140897.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 20425135 is about 4519.4175509683. The cubic root of 20425135 is about 273.3516157049.

Adding to 20425135 its reverse (53152402), we get a palindrome (73577537).

The spelling of 20425135 in words is "twenty million, four hundred twenty-five thousand, one hundred thirty-five".