21098466 has 24 divisors (see below), whose sum is σ = 46778160. Its totient is φ = 6869016.

The previous prime is 21098461. The next prime is 21098471. The reversal of 21098466 is 66489012.

It is an interprime number because it is at equal distance from previous prime (21098461) and next prime (21098471).

It is a self number, because there is not a number n which added to its sum of digits gives 21098466.

It is not an unprimeable number, because it can be changed into a prime (21098461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12856 + ... + 14403.

It is an arithmetic number, because the mean of its divisors is an integer number (1949090).

Almost surely, 2^21098466 is an apocalyptic number.

21098466 is an abundant number, since it is smaller than the sum of its proper divisors (25679694).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21098466 is a wasteful number, since it uses less digits than its factorization.

21098466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27310 (or 27307 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 21098466 is about 4593.3066520754. The cubic root of 21098466 is about 276.3229521437.

The spelling of 21098466 in words is "twenty-one million, ninety-eight thousand, four hundred sixty-six".