20523395 has 8 divisors (see below), whose sum is σ = 25422720. Its totient is φ = 15888960.

The previous prime is 20523379. The next prime is 20523407. The reversal of 20523395 is 59332502.

20523395 = 423² + 424² + ... + 515².

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

It is not a de Polignac number, because 20523395 - 2⁴ = 20523379 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66050 + ... + 66359.

It is an arithmetic number, because the mean of its divisors is an integer number (3177840).

Almost surely, 2^20523395 is an apocalyptic number.

20523395 is a deficient number, since it is larger than the sum of its proper divisors (4899325).

20523395 is a wasteful number, since it uses less digits than its factorization.

20523395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132445.

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 20523395 is about 4530.2753779434. The cubic root of 20523395 is about 273.7892557842.

Adding to 20523395 its reverse (59332502), we get a palindrome (79855897).

The spelling of 20523395 in words is "twenty million, five hundred twenty-three thousand, three hundred ninety-five".