21002234 has 16 divisors (see below), whose sum is σ = 34456320. Its totient is φ = 9521760.

The previous prime is 21002231. The next prime is 21002251. The reversal of 21002234 is 43220012.

It is not an unprimeable number, because it can be changed into a prime (21002231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9542 + ... + 11534.

It is an arithmetic number, because the mean of its divisors is an integer number (2153520).

Almost surely, 2^21002234 is an apocalyptic number.

21002234 is a deficient number, since it is larger than the sum of its proper divisors (13454086).

21002234 is a wasteful number, since it uses less digits than its factorization.

21002234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 21002234 is about 4582.8194378570. The cubic root of 21002234 is about 275.9022005239.

Adding to 21002234 its reverse (43220012), we get a palindrome (64222246).

It can be divided in two parts, 2100 and 2234, that added together give a palindrome (4334).

The spelling of 21002234 in words is "twenty-one million, two thousand, two hundred thirty-four".