20755700 has 72 divisors (see below), whose sum is σ = 52080000. Its totient is φ = 7032960.

The previous prime is 20755681. The next prime is 20755703. The reversal of 20755700 is 755702.

It is a self number, because there is not a number n which added to its sum of digits gives 20755700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20755703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104201 + ... + 104399.

Almost surely, 2^20755700 is an apocalyptic number.

20755700 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 20755700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26040000).

20755700 is an abundant number, since it is smaller than the sum of its proper divisors (31324300).

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

20755700 is a wasteful number, since it uses less digits than its factorization.

20755700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 26.

The square root of 20755700 is about 4555.8424028932. The cubic root of 20755700 is about 274.8183924911.

The spelling of 20755700 in words is "twenty million, seven hundred fifty-five thousand, seven hundred".