21035274 has 16 divisors (see below), whose sum is σ = 45306912. Its totient is φ = 6472368.

The previous prime is 21035269. The next prime is 21035281. The reversal of 21035274 is 47253012.

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, 134764 + ... + 134919.

It is an arithmetic number, because the mean of its divisors is an integer number (2831682).

Almost surely, 2^21035274 is an apocalyptic number.

21035274 is an abundant number, since it is smaller than the sum of its proper divisors (24271638).

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

21035274 is a wasteful number, since it uses less digits than its factorization.

21035274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269701.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 21035274 is about 4586.4227890590. The cubic root of 21035274 is about 276.0468047067.

Adding to 21035274 its reverse (47253012), we get a palindrome (68288286).

The spelling of 21035274 in words is "twenty-one million, thirty-five thousand, two hundred seventy-four".