21860733 has 8 divisors (see below), whose sum is σ = 29311200. Its totient is φ = 14492048.

The previous prime is 21860731. The next prime is 21860771. The reversal of 21860733 is 33706812.

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 21860733 - 2¹ = 21860731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21860733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21860731) 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, 19818 + ... + 20891.

It is an arithmetic number, because the mean of its divisors is an integer number (3663900).

Almost surely, 2^21860733 is an apocalyptic number.

It is an amenable number.

21860733 is a deficient number, since it is larger than the sum of its proper divisors (7450467).

21860733 is a wasteful number, since it uses less digits than its factorization.

21860733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40891.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 21860733 is about 4675.5462782439. The cubic root of 21860733 is about 279.6114210205.

The spelling of 21860733 in words is "twenty-one million, eight hundred sixty thousand, seven hundred thirty-three".