20545760 has 24 divisors (see below), whose sum is σ = 48539736. Its totient is φ = 8218240.

The previous prime is 20545711. The next prime is 20545769. The reversal of 20545760 is 6754502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64046 + ... + 64365.

It is an arithmetic number, because the mean of its divisors is an integer number (2022489).

Almost surely, 2^20545760 is an apocalyptic number.

20545760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20545760 is an abundant number, since it is smaller than the sum of its proper divisors (27993976).

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

20545760 is a wasteful number, since it uses less digits than its factorization.

20545760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128426 (or 128418 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 20545760 is about 4532.7430988310. The cubic root of 20545760 is about 273.8886719838. Note that the first 3 decimals are identical.

The spelling of 20545760 in words is "twenty million, five hundred forty-five thousand, seven hundred sixty".