21829034 has 4 divisors (see below), whose sum is σ = 32743554. Its totient is φ = 10914516.

The previous prime is 21828973. The next prime is 21829091. The reversal of 21829034 is 43092812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21576025 + 253009 = 4645^2 + 503^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21828988 and 21829006.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5457257 + ... + 5457260.

Almost surely, 2^21829034 is an apocalyptic number.

21829034 is a deficient number, since it is larger than the sum of its proper divisors (10914520).

21829034 is a wasteful number, since it uses less digits than its factorization.

21829034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10914519.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 21829034 is about 4672.1551772175. The cubic root of 21829034 is about 279.4762061279.

The spelling of 21829034 in words is "twenty-one million, eight hundred twenty-nine thousand, thirty-four".