20235387 has 4 divisors (see below), whose sum is σ = 26980520. Its totient is φ = 13490256.

The previous prime is 20235373. The next prime is 20235403. The reversal of 20235387 is 78353202.

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

It is not a de Polignac number, because 20235387 - 2¹⁵ = 20202619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20230387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3372562 + ... + 3372567.

It is an arithmetic number, because the mean of its divisors is an integer number (6745130).

Almost surely, 2^20235387 is an apocalyptic number.

20235387 is a deficient number, since it is larger than the sum of its proper divisors (6745133).

20235387 is an equidigital number, since it uses as much as digits as its factorization.

20235387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6745132.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20235387 is about 4498.3760403061. The cubic root of 20235387 is about 272.5025087444.

Adding to 20235387 its reverse (78353202), we get a palindrome (98588589).

The spelling of 20235387 in words is "twenty million, two hundred thirty-five thousand, three hundred eighty-seven".