20725322 has 4 divisors (see below), whose sum is σ = 31087986. Its totient is φ = 10362660.

The previous prime is 20725307. The next prime is 20725337. The reversal of 20725322 is 22352702.

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

It is an interprime number because it is at equal distance from previous prime (20725307) and next prime (20725337).

It can be written as a sum of positive squares in only one way, i.e., 15531481 + 5193841 = 3941^2 + 2279^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5181329 + ... + 5181332.

Almost surely, 2^20725322 is an apocalyptic number.

20725322 is a deficient number, since it is larger than the sum of its proper divisors (10362664).

20725322 is a wasteful number, since it uses less digits than its factorization.

20725322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10362663.

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

The square root of 20725322 is about 4552.5072213012. The cubic root of 20725322 is about 274.6842524821.

The spelling of 20725322 in words is "twenty million, seven hundred twenty-five thousand, three hundred twenty-two".