21010324 has 6 divisors (see below), whose sum is σ = 36768074. Its totient is φ = 10505160.

The previous prime is 21010321. The next prime is 21010337. The reversal of 21010324 is 42301012.

It can be written as a sum of positive squares in only one way, i.e., 12830724 + 8179600 = 3582^2 + 2860^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626287 + ... + 2626294.

Almost surely, 2^21010324 is an apocalyptic number.

It is an amenable number.

21010324 is a deficient number, since it is larger than the sum of its proper divisors (15757750).

21010324 is a wasteful number, since it uses less digits than its factorization.

21010324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252585 (or 5252583 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 21010324 is about 4583.7019972943. The cubic root of 21010324 is about 275.9376215538.

Adding to 21010324 its reverse (42301012), we get a palindrome (63311336).

The spelling of 21010324 in words is "twenty-one million, ten thousand, three hundred twenty-four".