20748722 has 8 divisors (see below), whose sum is σ = 32761200. Its totient is φ = 9828324.

The previous prime is 20748719. The next prime is 20748727. The reversal of 20748722 is 22784702.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20748727) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 272972 + ... + 273047.

It is an arithmetic number, because the mean of its divisors is an integer number (4095150).

Almost surely, 2^20748722 is an apocalyptic number.

20748722 is a deficient number, since it is larger than the sum of its proper divisors (12012478).

20748722 is a wasteful number, since it uses less digits than its factorization.

20748722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546040.

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 20748722 is about 4555.0765086879. The cubic root of 20748722 is about 274.7875913507.

The spelling of 20748722 in words is "twenty million, seven hundred forty-eight thousand, seven hundred twenty-two".