20077750 has 96 divisors (see below), whose sum is σ = 48016800. Its totient is φ = 6216000.

The previous prime is 20077703. The next prime is 20077751. The reversal of 20077750 is 5777002.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20077751) 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 47 ways as a sum of consecutive naturals, for example, 134676 + ... + 134824.

It is an arithmetic number, because the mean of its divisors is an integer number (500175).

Almost surely, 2^20077750 is an apocalyptic number.

20077750 is an abundant number, since it is smaller than the sum of its proper divisors (27939050).

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

20077750 is a wasteful number, since it uses less digits than its factorization.

20077750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 3430, while the sum is 28.

The square root of 20077750 is about 4480.8202374119. The cubic root of 20077750 is about 271.7930501235.

The spelling of 20077750 in words is "twenty million, seventy-seven thousand, seven hundred fifty".