21529098 has 32 divisors (see below), whose sum is σ = 48006720. Its totient is φ = 7151760.

The previous prime is 21529093. The next prime is 21529129. The reversal of 21529098 is 89092512.

It is not an unprimeable number, because it can be changed into a prime (21529091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22261 + ... + 23207.

It is an arithmetic number, because the mean of its divisors is an integer number (1500210).

Almost surely, 2^21529098 is an apocalyptic number.

21529098 is an abundant number, since it is smaller than the sum of its proper divisors (26477622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21529098 is a wasteful number, since it uses less digits than its factorization.

21529098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379 (or 1373 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 21529098 is about 4639.9459048571. The cubic root of 21529098 is about 278.1902756857.

The spelling of 21529098 in words is "twenty-one million, five hundred twenty-nine thousand, ninety-eight".