20861060 has 24 divisors (see below), whose sum is σ = 47791296. Its totient is φ = 7585760.

The previous prime is 20861051. The next prime is 20861077. The reversal of 20861060 is 6016802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47192 + ... + 47631.

It is an arithmetic number, because the mean of its divisors is an integer number (1991304).

Almost surely, 2^20861060 is an apocalyptic number.

20861060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20861060 is an abundant number, since it is smaller than the sum of its proper divisors (26930236).

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

20861060 is a wasteful number, since it uses less digits than its factorization.

20861060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94843 (or 94841 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 20861060 is about 4567.3909401320. The cubic root of 20861060 is about 275.2826185433.

Adding to 20861060 its reverse (6016802), we get a palindrome (26877862).

The spelling of 20861060 in words is "twenty million, eight hundred sixty-one thousand, sixty".