20541366 has 24 divisors (see below), whose sum is σ = 44904600. Its totient is φ = 6785856.

The previous prime is 20541349. The next prime is 20541371. The reversal of 20541366 is 66314502.

20541366 = T₁₂₂₀ + T₁₂₂₁ + ... + T₁₂₄₆.

It is a Curzon number.

It is a congruent number.

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, 3016 + ... + 7083.

It is an arithmetic number, because the mean of its divisors is an integer number (1871025).

Almost surely, 2^20541366 is an apocalyptic number.

20541366 is an abundant number, since it is smaller than the sum of its proper divisors (24363234).

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

20541366 is a wasteful number, since it uses less digits than its factorization.

20541366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10220 (or 10217 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20541366 is about 4532.2583774538. The cubic root of 20541366 is about 273.8691456091.

Adding to 20541366 its reverse (66314502), we get a palindrome (86855868).

The spelling of 20541366 in words is "twenty million, five hundred forty-one thousand, three hundred sixty-six".