20326261 has 8 divisors (see below), whose sum is σ = 20585664. Its totient is φ = 20068800.

The previous prime is 20326249. The next prime is 20326277. The reversal of 20326261 is 16262302.

It is a happy number.

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 20326261 - 2²¹ = 18229109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20326291) 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, 33981 + ... + 34573.

It is an arithmetic number, because the mean of its divisors is an integer number (2573208).

Almost surely, 2^20326261 is an apocalyptic number.

It is an amenable number.

20326261 is a deficient number, since it is larger than the sum of its proper divisors (259403).

20326261 is a wasteful number, since it uses less digits than its factorization.

20326261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 20326261 is about 4508.4654817354. The cubic root of 20326261 is about 272.9098218615.

Adding to 20326261 its reverse (16262302), we get a palindrome (36588563).

The spelling of 20326261 in words is "twenty million, three hundred twenty-six thousand, two hundred sixty-one".