21363704 has 8 divisors (see below), whose sum is σ = 40056960. Its totient is φ = 10681848.

The previous prime is 21363703. The next prime is 21363739. The reversal of 21363704 is 40736312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21363703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1335224 + ... + 1335239.

It is an arithmetic number, because the mean of its divisors is an integer number (5007120).

Almost surely, 2^21363704 is an apocalyptic number.

It is an amenable number.

21363704 is a deficient number, since it is larger than the sum of its proper divisors (18693256).

21363704 is a wasteful number, since it uses less digits than its factorization.

21363704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670469 (or 2670465 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 21363704 is about 4622.0887053366. The cubic root of 21363704 is about 277.4760588603.

The spelling of 21363704 in words is "twenty-one million, three hundred sixty-three thousand, seven hundred four".