21273098 has 32 divisors (see below), whose sum is σ = 40186368. Its totient is φ = 8204400.

The previous prime is 21273097. The next prime is 21273101. The reversal of 21273098 is 89037212.

It is a super-3 number, since 3×21273098³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (21273097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15833 + ... + 17123.

It is an arithmetic number, because the mean of its divisors is an integer number (1255824).

Almost surely, 2^21273098 is an apocalyptic number.

21273098 is a deficient number, since it is larger than the sum of its proper divisors (18913270).

21273098 is a wasteful number, since it uses less digits than its factorization.

21273098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1418.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 21273098 is about 4612.2768780723. The cubic root of 21273098 is about 277.0832333817.

It can be divided in two parts, 2127 and 3098, that added together give a palindrome (5225).

The spelling of 21273098 in words is "twenty-one million, two hundred seventy-three thousand, ninety-eight".