20520322 has 4 divisors (see below), whose sum is σ = 30780486. Its totient is φ = 10260160.

The previous prime is 20520319. The next prime is 20520337. The reversal of 20520322 is 22302502.

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

It can be written as a sum of positive squares in only one way, i.e., 18326961 + 2193361 = 4281^2 + 1481^2 .

It is a super-2 number, since 2×20520322² = 842167229967368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20520296 and 20520305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5130079 + ... + 5130082.

Almost surely, 2^20520322 is an apocalyptic number.

20520322 is a deficient number, since it is larger than the sum of its proper divisors (10260164).

20520322 is a wasteful number, since it uses less digits than its factorization.

20520322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10260163.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 20520322 is about 4529.9362026413. The cubic root of 20520322 is about 273.7755901378.

Adding to 20520322 its reverse (22302502), we get a palindrome (42822824).

The spelling of 20520322 in words is "twenty million, five hundred twenty thousand, three hundred twenty-two".