21054110 has 64 divisors (see below), whose sum is σ = 48591360. Its totient is φ = 6376320.

The previous prime is 21054067. The next prime is 21054119. The reversal of 21054110 is 1145012.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21054119) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28121 + ... + 28859.

It is an arithmetic number, because the mean of its divisors is an integer number (759240).

Almost surely, 2^21054110 is an apocalyptic number.

21054110 is an abundant number, since it is smaller than the sum of its proper divisors (27537250).

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

21054110 is a wasteful number, since it uses less digits than its factorization.

21054110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 21054110 is about 4588.4757817820. The cubic root of 21054110 is about 276.1291753379.

Adding to 21054110 its reverse (1145012), we get a palindrome (22199122).

The spelling of 21054110 in words is "twenty-one million, fifty-four thousand, one hundred ten".