20860480 has 112 divisors (see below), whose sum is σ = 54132480. Its totient is φ = 7630848.

The previous prime is 20860459. The next prime is 20860493. The reversal of 20860480 is 8406802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285724 + ... + 285796.

Almost surely, 2^20860480 is an apocalyptic number.

20860480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20860480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27066240).

20860480 is an abundant number, since it is smaller than the sum of its proper divisors (33272000).

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

20860480 is a wasteful number, since it uses less digits than its factorization.

20860480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20860480 is about 4567.3274461111. The cubic root of 20860480 is about 275.2800672923.

The spelling of 20860480 in words is "twenty million, eight hundred sixty thousand, four hundred eighty".