21350274 has 32 divisors (see below), whose sum is σ = 47672064. Its totient is φ = 6318480.

The previous prime is 21350213. The next prime is 21350291. The reversal of 21350274 is 47205312.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924 + ... + 6599.

It is an arithmetic number, because the mean of its divisors is an integer number (1489752).

Almost surely, 2^21350274 is an apocalyptic number.

21350274 is an abundant number, since it is smaller than the sum of its proper divisors (26321790).

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

21350274 is a wasteful number, since it uses less digits than its factorization.

21350274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7582.

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

The square root of 21350274 is about 4620.6356705544. The cubic root of 21350274 is about 277.4179028306.

Adding to 21350274 its reverse (47205312), we get a palindrome (68555586).

The spelling of 21350274 in words is "twenty-one million, three hundred fifty thousand, two hundred seventy-four".