21850741 has 8 divisors (see below), whose sum is σ = 25092000. Its totient is φ = 18818640.

The previous prime is 21850733. The next prime is 21850769. The reversal of 21850741 is 14705812.

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 21850741 - 2³ = 21850733 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21850721) 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, 52066 + ... + 52483.

It is an arithmetic number, because the mean of its divisors is an integer number (3136500).

Almost surely, 2^21850741 is an apocalyptic number.

It is an amenable number.

21850741 is a deficient number, since it is larger than the sum of its proper divisors (3241259).

21850741 is a wasteful number, since it uses less digits than its factorization.

21850741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104579.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 21850741 is about 4674.4776178735. The cubic root of 21850741 is about 279.5688133749.

Subtracting from 21850741 its reverse (14705812), we obtain a square (7144929 = 2673²).

The spelling of 21850741 in words is "twenty-one million, eight hundred fifty thousand, seven hundred forty-one".