21377298 has 16 divisors (see below), whose sum is σ = 43148160. Its totient is φ = 7060176.

The previous prime is 21377269. The next prime is 21377303. The reversal of 21377298 is 89277312.

It is a Curzon number.

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, 15690 + ... + 16997.

It is an arithmetic number, because the mean of its divisors is an integer number (2696760).

Almost surely, 2^21377298 is an apocalyptic number.

21377298 is an abundant number, since it is smaller than the sum of its proper divisors (21770862).

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

21377298 is a wasteful number, since it uses less digits than its factorization.

21377298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32801.

The product of its digits is 42336, while the sum is 39.

The square root of 21377298 is about 4623.5590187647. The cubic root of 21377298 is about 277.5349002449.

The spelling of 21377298 in words is "twenty-one million, three hundred seventy-seven thousand, two hundred ninety-eight".