20572322 has 4 divisors (see below), whose sum is σ = 30858486. Its totient is φ = 10286160.

The previous prime is 20572319. The next prime is 20572337. The reversal of 20572322 is 22327502.

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., 20151121 + 421201 = 4489^2 + 649^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5143079 + ... + 5143082.

Almost surely, 2^20572322 is an apocalyptic number.

20572322 is a deficient number, since it is larger than the sum of its proper divisors (10286164).

20572322 is a wasteful number, since it uses less digits than its factorization.

20572322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10286163.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 20572322 is about 4535.6721662836. The cubic root of 20572322 is about 274.0066508766.

Adding to 20572322 its reverse (22327502), we get a palindrome (42899824).

It can be divided in two parts, 205 and 72322, that added together give a palindrome (72527).

The spelling of 20572322 in words is "twenty million, five hundred seventy-two thousand, three hundred twenty-two".