20652405 has 8 divisors (see below), whose sum is σ = 33043872. Its totient is φ = 11014608.

The previous prime is 20652403. The next prime is 20652407. The reversal of 20652405 is 50425602.

It is an interprime number because it is at equal distance from previous prime (20652403) and next prime (20652407).

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

It is not a de Polignac number, because 20652405 - 2¹ = 20652403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20652403) 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 7 ways as a sum of consecutive naturals, for example, 688399 + ... + 688428.

It is an arithmetic number, because the mean of its divisors is an integer number (4130484).

Almost surely, 2^20652405 is an apocalyptic number.

It is an amenable number.

20652405 is a deficient number, since it is larger than the sum of its proper divisors (12391467).

20652405 is a wasteful number, since it uses less digits than its factorization.

20652405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376835.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20652405 is about 4544.4917207538. The cubic root of 20652405 is about 274.3617373982.

The spelling of 20652405 in words is "twenty million, six hundred fifty-two thousand, four hundred five".