21892441 has 2 divisors, whose sum is σ = 21892442. Its totient is φ = 21892440.

The previous prime is 21892411. The next prime is 21892469. The reversal of 21892441 is 14429812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13505625 + 8386816 = 3675^2 + 2896^2 .

It is a cyclic number.

It is not a de Polignac number, because 21892441 - 2¹⁹ = 21368153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21892411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10946220 + 10946221.

It is an arithmetic number, because the mean of its divisors is an integer number (10946221).

Almost surely, 2^21892441 is an apocalyptic number.

It is an amenable number.

21892441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21892441 is an equidigital number, since it uses as much as digits as its factorization.

21892441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 21892441 is about 4678.9358832965. The cubic root of 21892441 is about 279.7465435993.

The spelling of 21892441 in words is "twenty-one million, eight hundred ninety-two thousand, four hundred forty-one".