20540268 has 36 divisors (see below), whose sum is σ = 59339280. Its totient is φ = 5868576.

The previous prime is 20540251. The next prime is 20540279. The reversal of 20540268 is 86204502.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40503 + ... + 41006.

Almost surely, 2^20540268 is an apocalyptic number.

20540268 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20540268 is an abundant number, since it is smaller than the sum of its proper divisors (38799012).

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

20540268 is a wasteful number, since it uses less digits than its factorization.

20540268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81526 (or 81521 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 20540268 is about 4532.1372441708. The cubic root of 20540268 is about 273.8642658025.

The spelling of 20540268 in words is "twenty million, five hundred forty thousand, two hundred sixty-eight".