21485029 has 8 divisors (see below), whose sum is σ = 22818240. Its totient is φ = 20172096.

The previous prime is 21485021. The next prime is 21485033. The reversal of 21485029 is 92058412.

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 21485029 - 2³ = 21485021 is a prime.

It is a super-2 number, since 2×21485029² = 923212942261682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21485021) 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, 2857 + ... + 7150.

It is an arithmetic number, because the mean of its divisors is an integer number (2852280).

Almost surely, 2^21485029 is an apocalyptic number.

It is an amenable number.

21485029 is a deficient number, since it is larger than the sum of its proper divisors (1333211).

21485029 is a wasteful number, since it uses less digits than its factorization.

21485029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10139.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 21485029 is about 4635.1946021715. The cubic root of 21485029 is about 278.0003321080. Note that the first 3 decimals are identical.

The spelling of 21485029 in words is "twenty-one million, four hundred eighty-five thousand, twenty-nine".