20944730 has 8 divisors (see below), whose sum is σ = 37700532. Its totient is φ = 8377888.

The previous prime is 20944711. The next prime is 20944739. The reversal of 20944730 is 3744902.

It can be written as a sum of positive squares in 2 ways, for example, as 19545241 + 1399489 = 4421^2 + 1183^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20944693 and 20944702.

It is not an unprimeable number, because it can be changed into a prime (20944739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047227 + ... + 1047246.

Almost surely, 2^20944730 is an apocalyptic number.

20944730 is a deficient number, since it is larger than the sum of its proper divisors (16755802).

20944730 is a wasteful number, since it uses less digits than its factorization.

20944730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2094480.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 20944730 is about 4576.5412704356. The cubic root of 20944730 is about 275.6501641283.

The spelling of 20944730 in words is "twenty million, nine hundred forty-four thousand, seven hundred thirty".