21070498 has 8 divisors (see below), whose sum is σ = 32124060. Its totient is φ = 10362480.

The previous prime is 21070481. The next prime is 21070513. The reversal of 21070498 is 89407012.

It can be written as a sum of positive squares in 2 ways, for example, as 21040569 + 29929 = 4587^2 + 173^2 .

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, 86233 + ... + 86476.

Almost surely, 2^21070498 is an apocalyptic number.

21070498 is a deficient number, since it is larger than the sum of its proper divisors (11053562).

21070498 is a wasteful number, since it uses less digits than its factorization.

21070498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172772.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 21070498 is about 4590.2612126109. The cubic root of 21070498 is about 276.2008008040.

The spelling of 21070498 in words is "twenty-one million, seventy thousand, four hundred ninety-eight".