21112354 has 8 divisors (see below), whose sum is σ = 31723200. Its totient is φ = 10537956.

The previous prime is 21112349. The next prime is 21112361. The reversal of 21112354 is 45321112.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7614 + ... + 10009.

It is an arithmetic number, because the mean of its divisors is an integer number (3965400).

Almost surely, 2^21112354 is an apocalyptic number.

21112354 is a deficient number, since it is larger than the sum of its proper divisors (10610846).

21112354 is a wasteful number, since it uses less digits than its factorization.

21112354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18224.

The product of its digits is 240, while the sum is 19.

The square root of 21112354 is about 4594.8181683283. The cubic root of 21112354 is about 276.3835684218.

Adding to 21112354 its reverse (45321112), we get a palindrome (66433466).

It can be divided in two parts, 2111 and 2354, that added together give a triangular number (4465 = T₉₄).

The spelling of 21112354 in words is "twenty-one million, one hundred twelve thousand, three hundred fifty-four".