21414500 has 24 divisors (see below), whose sum is σ = 46770360. Its totient is φ = 8565600.

The previous prime is 21414461. The next prime is 21414529. The reversal of 21414500 is 541412.

It can be written as a sum of positive squares in 4 ways, for example, as 33124 + 21381376 = 182^2 + 4624^2 .

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, 20915 + ... + 21914.

It is an arithmetic number, because the mean of its divisors is an integer number (1948765).

Almost surely, 2^21414500 is an apocalyptic number.

21414500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21414500 is an abundant number, since it is smaller than the sum of its proper divisors (25355860).

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

21414500 is a wasteful number, since it uses less digits than its factorization.

21414500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42848 (or 42836 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 21414500 is about 4627.5803612687. The cubic root of 21414500 is about 277.6958009949.

Adding to 21414500 its reverse (541412), we get a palindrome (21955912).

The spelling of 21414500 in words is "twenty-one million, four hundred fourteen thousand, five hundred".