20540976 has 80 divisors (see below), whose sum is σ = 56663040. Its totient is φ = 6393600.

The previous prime is 20540969. The next prime is 20540977. The reversal of 20540976 is 67904502.

It is not an unprimeable number, because it can be changed into a prime (20540977) 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, 92001 + ... + 92223.

It is an arithmetic number, because the mean of its divisors is an integer number (708288).

Almost surely, 2^20540976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20540976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28331520).

20540976 is an abundant number, since it is smaller than the sum of its proper divisors (36122064).

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

20540976 is a wasteful number, since it uses less digits than its factorization.

20540976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20540976 is about 4532.2153523415. The cubic root of 20540976 is about 273.8674123643.

The spelling of 20540976 in words is "twenty million, five hundred forty thousand, nine hundred seventy-six".