20775960 has 64 divisors (see below), whose sum is σ = 69256800. Its totient is φ = 5539968.

The previous prime is 20775959. The next prime is 20775961. The reversal of 20775960 is 6957702.

It is an interprime number because it is at equal distance from previous prime (20775959) and next prime (20775961).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20775961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8539 + ... + 10698.

Almost surely, 2^20775960 is an apocalyptic number.

20775960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20775960 is an abundant number, since it is smaller than the sum of its proper divisors (48480840).

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

20775960 is a wasteful number, since it uses less digits than its factorization.

20775960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19257 (or 19247 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 20775960 is about 4558.0653790835. The cubic root of 20775960 is about 274.9077817512.

It can be divided in two parts, 207 and 75960, that added together give a palindrome (76167).

The spelling of 20775960 in words is "twenty million, seven hundred seventy-five thousand, nine hundred sixty".