21029198 has 8 divisors (see below), whose sum is σ = 31646160. Its totient is φ = 10480480.

The previous prime is 21029189. The next prime is 21029207. The reversal of 21029198 is 89192012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21029189) and next prime (21029207).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16283 + ... + 17526.

It is an arithmetic number, because the mean of its divisors is an integer number (3955770).

Almost surely, 2^21029198 is an apocalyptic number.

21029198 is a deficient number, since it is larger than the sum of its proper divisors (10616962).

21029198 is a wasteful number, since it uses less digits than its factorization.

21029198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34122.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 21029198 is about 4585.7603513485. The cubic root of 21029198 is about 276.0202236109.

The spelling of 21029198 in words is "twenty-one million, twenty-nine thousand, one hundred ninety-eight".