20269730 has 16 divisors (see below), whose sum is σ = 39292344. Its totient is φ = 7484160.

The previous prime is 20269721. The next prime is 20269771. The reversal of 20269730 is 3796202.

It can be written as a sum of positive squares in 4 ways, for example, as 12187081 + 8082649 = 3491^2 + 2843^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20269693 and 20269702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77831 + ... + 78090.

Almost surely, 2^20269730 is an apocalyptic number.

20269730 is a deficient number, since it is larger than the sum of its proper divisors (19022614).

20269730 is a wasteful number, since it uses less digits than its factorization.

20269730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155941.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20269730 is about 4502.1916885002. The cubic root of 20269730 is about 272.6565831270.

The spelling of 20269730 in words is "twenty million, two hundred sixty-nine thousand, seven hundred thirty".