20652619 has 4 divisors (see below), whose sum is σ = 22241296. Its totient is φ = 19063944.

The previous prime is 20652607. The next prime is 20652629. The reversal of 20652619 is 91625602.

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

It is a cyclic number.

It is not a de Polignac number, because 20652619 - 2¹¹ = 20650571 is a prime.

It is a super-2 number, since 2×20652619² = 853061343118322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20652629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794319 + ... + 794344.

It is an arithmetic number, because the mean of its divisors is an integer number (5560324).

Almost surely, 2^20652619 is an apocalyptic number.

20652619 is a deficient number, since it is larger than the sum of its proper divisors (1588677).

20652619 is a wasteful number, since it uses less digits than its factorization.

20652619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1588676.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 20652619 is about 4544.5152656802. The cubic root of 20652619 is about 274.3626850394.

It can be divided in two parts, 206 and 52619, that added together give a palindrome (52825).

The spelling of 20652619 in words is "twenty million, six hundred fifty-two thousand, six hundred nineteen".