21860481 has 8 divisors (see below), whose sum is σ = 29194560. Its totient is φ = 14550032.

The previous prime is 21860479. The next prime is 21860483. The reversal of 21860481 is 18406812.

It is an interprime number because it is at equal distance from previous prime (21860479) and next prime (21860483).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21860481 - 2¹ = 21860479 is a prime.

It is a super-2 number, since 2×21860481² = 955761259102722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21860483) 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, 3621 + ... + 7538.

It is an arithmetic number, because the mean of its divisors is an integer number (3649320).

Almost surely, 2^21860481 is an apocalyptic number.

It is an amenable number.

21860481 is a deficient number, since it is larger than the sum of its proper divisors (7334079).

21860481 is a wasteful number, since it uses less digits than its factorization.

21860481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11815.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 21860481 is about 4675.5193294435. The cubic root of 21860481 is about 279.6103466078.

The spelling of 21860481 in words is "twenty-one million, eight hundred sixty thousand, four hundred eighty-one".