20766722 has 4 divisors (see below), whose sum is σ = 31150086. Its totient is φ = 10383360.

The previous prime is 20766701. The next prime is 20766751. The reversal of 20766722 is 22766702.

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., 18139081 + 2627641 = 4259^2 + 1621^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5191679 + ... + 5191682.

Almost surely, 2^20766722 is an apocalyptic number.

20766722 is a deficient number, since it is larger than the sum of its proper divisors (10383364).

20766722 is a wasteful number, since it uses less digits than its factorization.

20766722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10383363.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 20766722 is about 4557.0518978831. The cubic root of 20766722 is about 274.8670299306.

The spelling of 20766722 in words is "twenty million, seven hundred sixty-six thousand, seven hundred twenty-two".