20730370 has 16 divisors (see below), whose sum is σ = 37567800. Its totient is φ = 8235904.

The previous prime is 20730313. The next prime is 20730373. The reversal of 20730370 is 7303702.

It can be written as a sum of positive squares in 4 ways, for example, as 13965169 + 6765201 = 3737^2 + 2601^2 .

It is not an unprimeable number, because it can be changed into a prime (20730373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5467 + ... + 8446.

Almost surely, 2^20730370 is an apocalyptic number.

20730370 is a deficient number, since it is larger than the sum of its proper divisors (16837430).

20730370 is a wasteful number, since it uses less digits than its factorization.

20730370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14069.

The product of its (nonzero) digits is 882, while the sum is 22.

The square root of 20730370 is about 4553.0616073144. The cubic root of 20730370 is about 274.7065519916.

The spelling of 20730370 in words is "twenty million, seven hundred thirty thousand, three hundred seventy".