20755340 has 12 divisors (see below), whose sum is σ = 43586256. Its totient is φ = 8302128.

The previous prime is 20755321. The next prime is 20755367. The reversal of 20755340 is 4355702.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 518864 + ... + 518903.

It is an arithmetic number, because the mean of its divisors is an integer number (3632188).

Almost surely, 2^20755340 is an apocalyptic number.

20755340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20755340 is an abundant number, since it is smaller than the sum of its proper divisors (22830916).

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

20755340 is a wasteful number, since it uses less digits than its factorization.

20755340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1037776 (or 1037774 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 20755340 is about 4555.8028930146. The cubic root of 20755340 is about 274.8168036072.

The spelling of 20755340 in words is "twenty million, seven hundred fifty-five thousand, three hundred forty".