21310298 has 8 divisors (see below), whose sum is σ = 32829492. Its totient is φ = 10367136.

The previous prime is 21310297. The next prime is 21310301. The reversal of 21310298 is 89201312.

It can be written as a sum of positive squares in 2 ways, for example, as 21224449 + 85849 = 4607^2 + 293^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21310297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143915 + ... + 144062.

Almost surely, 2^21310298 is an apocalyptic number.

21310298 is a deficient number, since it is larger than the sum of its proper divisors (11519194).

21310298 is a wasteful number, since it uses less digits than its factorization.

21310298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288016.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 21310298 is about 4616.3078320233. The cubic root of 21310298 is about 277.2446499889.

The spelling of 21310298 in words is "twenty-one million, three hundred ten thousand, two hundred ninety-eight".