20268730 has 32 divisors (see below), whose sum is σ = 37997568. Its totient is φ = 7776000.

The previous prime is 20268701. The next prime is 20268733. The reversal of 20268730 is 3786202.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (20268733) 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 15 ways as a sum of consecutive naturals, for example, 46594 + ... + 47026.

It is an arithmetic number, because the mean of its divisors is an integer number (1187424).

Almost surely, 2^20268730 is an apocalyptic number.

20268730 is a deficient number, since it is larger than the sum of its proper divisors (17728838).

20268730 is a wasteful number, since it uses less digits than its factorization.

20268730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20268730 is about 4502.0806301087. The cubic root of 20268730 is about 272.6520992477.

The spelling of 20268730 in words is "twenty million, two hundred sixty-eight thousand, seven hundred thirty".