21365104 has 10 divisors (see below), whose sum is σ = 41394920. Its totient is φ = 10682544.

The previous prime is 21365093. The next prime is 21365117. The reversal of 21365104 is 40156312.

It is a super-3 number, since 3×21365104³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667644 + ... + 667675.

It is an arithmetic number, because the mean of its divisors is an integer number (4139492).

Almost surely, 2^21365104 is an apocalyptic number.

It is an amenable number.

21365104 is a deficient number, since it is larger than the sum of its proper divisors (20029816).

21365104 is a wasteful number, since it uses less digits than its factorization.

21365104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335327 (or 1335321 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 21365104 is about 4622.2401495379. The cubic root of 21365104 is about 277.4821198879.

The spelling of 21365104 in words is "twenty-one million, three hundred sixty-five thousand, one hundred four".