21941410 has 16 divisors (see below), whose sum is σ = 39558456. Its totient is φ = 8762368.

The previous prime is 21941401. The next prime is 21941411. The reversal of 21941410 is 1414912.

It can be written as a sum of positive squares in 4 ways, for example, as 20967241 + 974169 = 4579^2 + 987^2 .

It is not an unprimeable number, because it can be changed into a prime (21941411) 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, 6594 + ... + 9346.

Almost surely, 2^21941410 is an apocalyptic number.

21941410 is a deficient number, since it is larger than the sum of its proper divisors (17617046).

21941410 is a wasteful number, since it uses less digits than its factorization.

21941410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 21941410 is about 4684.1658809227. The cubic root of 21941410 is about 279.9549672475.

The spelling of 21941410 in words is "twenty-one million, nine hundred forty-one thousand, four hundred ten".