20652261 has 8 divisors (see below), whose sum is σ = 31470144. Its totient is φ = 11801280.

The previous prime is 20652239. The next prime is 20652271. The reversal of 20652261 is 16225602.

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

It is not a de Polignac number, because 20652261 - 2⁷ = 20652133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20652271) 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, 491700 + ... + 491741.

It is an arithmetic number, because the mean of its divisors is an integer number (3933768).

Almost surely, 2^20652261 is an apocalyptic number.

20652261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20652261 is a deficient number, since it is larger than the sum of its proper divisors (10817883).

20652261 is an equidigital number, since it uses as much as digits as its factorization.

20652261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983451.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20652261 is about 4544.4758773702. The cubic root of 20652261 is about 274.3610997294.

Adding to 20652261 its reverse (16225602), we get a palindrome (36877863).

The spelling of 20652261 in words is "twenty million, six hundred fifty-two thousand, two hundred sixty-one".