21298130 has 16 divisors (see below), whose sum is σ = 43813440. Its totient is φ = 7302192.

The previous prime is 21298117. The next prime is 21298141. The reversal of 21298130 is 3189212.

It is a super-2 number, since 2×21298130² = 907220682993800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21298130.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152060 + ... + 152199.

It is an arithmetic number, because the mean of its divisors is an integer number (2738340).

Almost surely, 2^21298130 is an apocalyptic number.

21298130 is an abundant number, since it is smaller than the sum of its proper divisors (22515310).

21298130 is a wasteful number, since it uses less digits than its factorization.

21298130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304273.

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

The square root of 21298130 is about 4614.9897074641. The cubic root of 21298130 is about 277.1918718253.

The spelling of 21298130 in words is "twenty-one million, two hundred ninety-eight thousand, one hundred thirty".