20261322 has 12 divisors (see below), whose sum is σ = 43899570. Its totient is φ = 6753768.

The previous prime is 20261303. The next prime is 20261323. The reversal of 20261322 is 22316202.

It can be written as a sum of positive squares in only one way, i.e., 19263321 + 998001 = 4389^2 + 999^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1125629 = 20261322 / (2 + 0 + 2 + 6 + 1 + 3 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 20261295 and 20261304.

It is not an unprimeable number, because it can be changed into a prime (20261323) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 562797 + ... + 562832.

Almost surely, 2^20261322 is an apocalyptic number.

20261322 is an abundant number, since it is smaller than the sum of its proper divisors (23638248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20261322 is a wasteful number, since it uses less digits than its factorization.

20261322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125637 (or 1125634 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20261322 is about 4501.2578242087. The cubic root of 20261322 is about 272.6188780761.

Adding to 20261322 its reverse (22316202), we get a palindrome (42577524).

The spelling of 20261322 in words is "twenty million, two hundred sixty-one thousand, three hundred twenty-two".