21298300 has 36 divisors (see below), whose sum is σ = 46422376. Its totient is φ = 8481600.

The previous prime is 21298283. The next prime is 21298307. The reversal of 21298300 is 389212.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21298307) 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, 37015 + ... + 37585.

Almost surely, 2^21298300 is an apocalyptic number.

21298300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21298300 is an abundant number, since it is smaller than the sum of its proper divisors (25124076).

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

21298300 is a wasteful number, since it uses less digits than its factorization.

21298300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 21298300 is about 4615.0081256700. The cubic root of 21298300 is about 277.1926093312.

The spelling of 21298300 in words is "twenty-one million, two hundred ninety-eight thousand, three hundred".