16620722 has 4 divisors (see below), whose sum is σ = 24931086. Its totient is φ = 8310360.

The previous prime is 16620707. The next prime is 16620727. The reversal of 16620722 is 22702661.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22702661 = 1237 ⋅18353.

It can be written as a sum of positive squares in only one way, i.e., 15295921 + 1324801 = 3911^2 + 1151^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16620691 and 16620700.

It is not an unprimeable number, because it can be changed into a prime (16620727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4155179 + ... + 4155182.

Almost surely, 2^16620722 is an apocalyptic number.

16620722 is a deficient number, since it is larger than the sum of its proper divisors (8310364).

16620722 is an equidigital number, since it uses as much as digits as its factorization.

16620722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8310363.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 16620722 is about 4076.8519718037. The cubic root of 16620722 is about 255.2015425758.

The spelling of 16620722 in words is "sixteen million, six hundred twenty thousand, seven hundred twenty-two".