21110274 has 48 divisors (see below), whose sum is σ = 49106400. Its totient is φ = 6721704.

The previous prime is 21110263. The next prime is 21110363. The reversal of 21110274 is 47201112.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28197 + ... + 28935.

It is an arithmetic number, because the mean of its divisors is an integer number (1023050).

Almost surely, 2^21110274 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21110274, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24553200).

21110274 is an abundant number, since it is smaller than the sum of its proper divisors (27996126).

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

21110274 is a wasteful number, since it uses less digits than its factorization.

21110274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 21110274 is about 4594.5918208259. The cubic root of 21110274 is about 276.3744916398.

Adding to 21110274 its reverse (47201112), we get a palindrome (68311386).

The spelling of 21110274 in words is "twenty-one million, one hundred ten thousand, two hundred seventy-four".