21230429 has 8 divisors (see below), whose sum is σ = 24379680. Its totient is φ = 18284400.

The previous prime is 21230401. The next prime is 21230431. The reversal of 21230429 is 92403212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21230429 - 2²⁴ = 4453213 is a prime.

It is a super-2 number, since 2×21230429² = 901462231048082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230459) 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, 50582 + ... + 50999.

It is an arithmetic number, because the mean of its divisors is an integer number (3047460).

Almost surely, 2^21230429 is an apocalyptic number.

It is an amenable number.

21230429 is a deficient number, since it is larger than the sum of its proper divisors (3149251).

21230429 is a wasteful number, since it uses less digits than its factorization.

21230429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101611.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21230429 is about 4607.6489666640. The cubic root of 21230429 is about 276.8978540516.

The spelling of 21230429 in words is "twenty-one million, two hundred thirty thousand, four hundred twenty-nine".