21629119 has 2 divisors, whose sum is σ = 21629120. Its totient is φ = 21629118.

The previous prime is 21629063. The next prime is 21629123. The reversal of 21629119 is 91192612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21629119 - 2¹¹ = 21627071 is a prime.

It is a super-2 number, since 2×21629119² = 935637577432322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21629519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10814559 + 10814560.

It is an arithmetic number, because the mean of its divisors is an integer number (10814560).

Almost surely, 2^21629119 is an apocalyptic number.

21629119 is a deficient number, since it is larger than the sum of its proper divisors (1).

21629119 is an equidigital number, since it uses as much as digits as its factorization.

21629119 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 31.

The square root of 21629119 is about 4650.7116659711. The cubic root of 21629119 is about 278.6204205121.

The spelling of 21629119 in words is "twenty-one million, six hundred twenty-nine thousand, one hundred nineteen".