20675760 has 160 divisors (see below), whose sum is σ = 75804672. Its totient is φ = 4561920.

The previous prime is 20675747. The next prime is 20675761. The reversal of 20675760 is 6757602.

It is not an unprimeable number, because it can be changed into a prime (20675761) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51882 + ... + 52278.

Almost surely, 2^20675760 is an apocalyptic number.

20675760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20675760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37902336).

20675760 is an abundant number, since it is smaller than the sum of its proper divisors (55128912).

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

20675760 is a wasteful number, since it uses less digits than its factorization.

20675760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 20675760 is about 4547.0605889959. The cubic root of 20675760 is about 274.4651201032.

The spelling of 20675760 in words is "twenty million, six hundred seventy-five thousand, seven hundred sixty".