21070898 has 8 divisors (see below), whose sum is σ = 32980608. Its totient is φ = 10077364.

The previous prime is 21070879. The next prime is 21070901. The reversal of 21070898 is 89807012.

It is a happy number.

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

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, 228986 + ... + 229077.

It is an arithmetic number, because the mean of its divisors is an integer number (4122576).

Almost surely, 2^21070898 is an apocalyptic number.

21070898 is a deficient number, since it is larger than the sum of its proper divisors (11909710).

21070898 is a wasteful number, since it uses less digits than its factorization.

21070898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458088.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 21070898 is about 4590.3047829093. The cubic root of 21070898 is about 276.2025485815.

The spelling of 21070898 in words is "twenty-one million, seventy thousand, eight hundred ninety-eight".