21418010 has 8 divisors (see below), whose sum is σ = 38552436. Its totient is φ = 8567200.

The previous prime is 21418009. The next prime is 21418013. The reversal of 21418010 is 1081412.

It can be written as a sum of positive squares in 2 ways, for example, as 20079361 + 1338649 = 4481^2 + 1157^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21418010.

It is not an unprimeable number, because it can be changed into a prime (21418013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070891 + ... + 1070910.

Almost surely, 2^21418010 is an apocalyptic number.

21418010 is a deficient number, since it is larger than the sum of its proper divisors (17134426).

21418010 is a wasteful number, since it uses less digits than its factorization.

21418010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141808.

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 21418010 is about 4627.9595936006. The cubic root of 21418010 is about 277.7109723198.

Adding to 21418010 its reverse (1081412), we get a palindrome (22499422).

The spelling of 21418010 in words is "twenty-one million, four hundred eighteen thousand, ten".