20730801 has 16 divisors (see below), whose sum is σ = 34020224. Its totient is φ = 10934784.

The previous prime is 20730799. The next prime is 20730823. The reversal of 20730801 is 10803702.

It is not a de Polignac number, because 20730801 - 2¹ = 20730799 is a prime.

It is a super-2 number, since 2×20730801² = 859532220203202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20734801) 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, 37696 + ... + 38241.

It is an arithmetic number, because the mean of its divisors is an integer number (2126264).

Almost surely, 2^20730801 is an apocalyptic number.

20730801 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20730801 is a deficient number, since it is larger than the sum of its proper divisors (13289423).

20730801 is a wasteful number, since it uses less digits than its factorization.

20730801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75960.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 20730801 is about 4553.1089378577. The cubic root of 20730801 is about 274.7084557637.

The spelling of 20730801 in words is "twenty million, seven hundred thirty thousand, eight hundred one".