21419800 has 24 divisors (see below), whose sum is σ = 49801500. Its totient is φ = 8567840.

The previous prime is 21419789. The next prime is 21419807. The reversal of 21419800 is 891412.

It is a happy number.

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 (21419807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53350 + ... + 53749.

Almost surely, 2^21419800 is an apocalyptic number.

21419800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21419800 is an abundant number, since it is smaller than the sum of its proper divisors (28381700).

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

21419800 is a wasteful number, since it uses less digits than its factorization.

21419800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107115 (or 107106 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 21419800 is about 4628.1529793212. The cubic root of 21419800 is about 277.7187086251.

The spelling of 21419800 in words is "twenty-one million, four hundred nineteen thousand, eight hundred".