21472298 has 4 divisors (see below), whose sum is σ = 32208450. Its totient is φ = 10736148.

The previous prime is 21472291. The next prime is 21472313. The reversal of 21472298 is 89227412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21132409 + 339889 = 4597^2 + 583^2 .

It is a super-2 number, since 2×21472298² = 922119162801608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21472291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5368073 + ... + 5368076.

Almost surely, 2^21472298 is an apocalyptic number.

21472298 is a deficient number, since it is larger than the sum of its proper divisors (10736152).

21472298 is a wasteful number, since it uses less digits than its factorization.

21472298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10736151.

The product of its digits is 16128, while the sum is 35.

The square root of 21472298 is about 4633.8211014237. The cubic root of 21472298 is about 277.9454113612.

The spelling of 21472298 in words is "twenty-one million, four hundred seventy-two thousand, two hundred ninety-eight".