20725768 has 16 divisors (see below), whose sum is σ = 44412480. Its totient is φ = 8882448.

The previous prime is 20725753. The next prime is 20725769. The reversal of 20725768 is 86752702.

It is not an unprimeable number, because it can be changed into a prime (20725769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184996 + ... + 185107.

It is an arithmetic number, because the mean of its divisors is an integer number (2775780).

Almost surely, 2^20725768 is an apocalyptic number.

20725768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20725768 is an abundant number, since it is smaller than the sum of its proper divisors (23686712).

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

20725768 is a wasteful number, since it uses less digits than its factorization.

20725768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370116 (or 370112 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 20725768 is about 4552.5562050347. The cubic root of 20725768 is about 274.6862228302.

The spelling of 20725768 in words is "twenty million, seven hundred twenty-five thousand, seven hundred sixty-eight".