20730732 has 24 divisors (see below), whose sum is σ = 52769472. Its totient is φ = 6282000.

The previous prime is 20730719. The next prime is 20730733. The reversal of 20730732 is 23703702.

It is not an unprimeable number, because it can be changed into a prime (20730733) 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 7 ways as a sum of consecutive naturals, for example, 78394 + ... + 78657.

It is an arithmetic number, because the mean of its divisors is an integer number (2198728).

Almost surely, 2^20730732 is an apocalyptic number.

20730732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20730732 is an abundant number, since it is smaller than the sum of its proper divisors (32038740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20730732 is a wasteful number, since it uses less digits than its factorization.

20730732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157069 (or 157067 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 24.

The square root of 20730732 is about 4553.1013606112. The cubic root of 20730732 is about 274.7081509853.

The spelling of 20730732 in words is "twenty million, seven hundred thirty thousand, seven hundred thirty-two".