21010364 has 6 divisors (see below), whose sum is σ = 36768144. Its totient is φ = 10505180.

The previous prime is 21010361. The next prime is 21010397. The reversal of 21010364 is 46301012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626292 + ... + 2626299.

It is an arithmetic number, because the mean of its divisors is an integer number (6128024).

Almost surely, 2^21010364 is an apocalyptic number.

It is an amenable number.

21010364 is a deficient number, since it is larger than the sum of its proper divisors (15757780).

21010364 is a wasteful number, since it uses less digits than its factorization.

21010364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252595 (or 5252593 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 21010364 is about 4583.7063605776. The cubic root of 21010364 is about 275.9377966660.

Adding to 21010364 its reverse (46301012), we get a palindrome (67311376).

The spelling of 21010364 in words is "twenty-one million, ten thousand, three hundred sixty-four".