21833479 has 2 divisors, whose sum is σ = 21833480. Its totient is φ = 21833478.

The previous prime is 21833447. The next prime is 21833501. The reversal of 21833479 is 97433812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21833479 - 2⁵ = 21833447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21839479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10916739 + 10916740.

It is an arithmetic number, because the mean of its divisors is an integer number (10916740).

Almost surely, 2^21833479 is an apocalyptic number.

21833479 is a deficient number, since it is larger than the sum of its proper divisors (1).

21833479 is an equidigital number, since it uses as much as digits as its factorization.

21833479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 21833479 is about 4672.6308435399. The cubic root of 21833479 is about 279.4951745566.

The spelling of 21833479 in words is "twenty-one million, eight hundred thirty-three thousand, four hundred seventy-nine".