20102385 has 8 divisors (see below), whose sum is σ = 32163840. Its totient is φ = 10721264.

The previous prime is 20102321. The next prime is 20102389. The reversal of 20102385 is 58320102.

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 20102385 - 2⁶ = 20102321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20102389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670065 + ... + 670094.

It is an arithmetic number, because the mean of its divisors is an integer number (4020480).

Almost surely, 2^20102385 is an apocalyptic number.

It is an amenable number.

20102385 is a deficient number, since it is larger than the sum of its proper divisors (12061455).

20102385 is a wasteful number, since it uses less digits than its factorization.

20102385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340167.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20102385 is about 4483.5683333702. The cubic root of 20102385 is about 271.9041662461.

Adding to 20102385 its reverse (58320102), we get a palindrome (78422487).

The spelling of 20102385 in words is "twenty million, one hundred two thousand, three hundred eighty-five".