21474029 has 8 divisors (see below), whose sum is σ = 21772800. Its totient is φ = 21177616.

The previous prime is 21473987. The next prime is 21474031. The reversal of 21474029 is 92047412.

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 21474029 - 2⁸ = 21473773 is a prime.

It is a super-2 number, since 2×21474029² = 922267842985682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21473992 and 21474010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21474059) 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, 24452 + ... + 25314.

It is an arithmetic number, because the mean of its divisors is an integer number (2721600).

Almost surely, 2^21474029 is an apocalyptic number.

It is an amenable number.

21474029 is a deficient number, since it is larger than the sum of its proper divisors (298771).

21474029 is a wasteful number, since it uses less digits than its factorization.

21474029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 21474029 is about 4634.0078765578. The cubic root of 21474029 is about 277.9528800631.

The spelling of 21474029 in words is "twenty-one million, four hundred seventy-four thousand, twenty-nine".