21098298 has 24 divisors (see below), whose sum is σ = 45694368. Its totient is φ = 6491472.

The previous prime is 21098269. The next prime is 21098327. The reversal of 21098298 is 89289012.

It is an interprime number because it is at equal distance from previous prime (21098269) and next prime (21098327).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9390 + ... + 11417.

It is an arithmetic number, because the mean of its divisors is an integer number (1903932).

Almost surely, 2^21098298 is an apocalyptic number.

21098298 is an abundant number, since it is smaller than the sum of its proper divisors (24596070).

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

21098298 is a wasteful number, since it uses less digits than its factorization.

21098298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20838 (or 20825 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 21098298 is about 4593.2883645598. The cubic root of 21098298 is about 276.3222187195.

The spelling of 21098298 in words is "twenty-one million, ninety-eight thousand, two hundred ninety-eight".