20814860 has 24 divisors (see below), whose sum is σ = 47685456. Its totient is φ = 7568960.

The previous prime is 20814811. The next prime is 20814863. The reversal of 20814860 is 6841802.

It is not an unprimeable number, because it can be changed into a prime (20814863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47087 + ... + 47526.

It is an arithmetic number, because the mean of its divisors is an integer number (1986894).

Almost surely, 2^20814860 is an apocalyptic number.

20814860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20814860 is an abundant number, since it is smaller than the sum of its proper divisors (26870596).

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

20814860 is a wasteful number, since it uses less digits than its factorization.

20814860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94633 (or 94631 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 20814860 is about 4562.3305447983. The cubic root of 20814860 is about 275.0792498867.

The spelling of 20814860 in words is "twenty million, eight hundred fourteen thousand, eight hundred sixty".