21733738 has 12 divisors (see below), whose sum is σ = 35301798. Its totient is φ = 10030800.

The previous prime is 21733717. The next prime is 21733741. The reversal of 21733738 is 83733712.

It can be written as a sum of positive squares in 3 ways, for example, as 9223369 + 12510369 = 3037^2 + 3537^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31813 + ... + 32488.

Almost surely, 2^21733738 is an apocalyptic number.

21733738 is a deficient number, since it is larger than the sum of its proper divisors (13568060).

21733738 is a wasteful number, since it uses less digits than its factorization.

21733738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64329 (or 64316 counting only the distinct ones).

The product of its digits is 21168, while the sum is 34.

The square root of 21733738 is about 4661.9457311299. The cubic root of 21733738 is about 279.0689226485.

The spelling of 21733738 in words is "twenty-one million, seven hundred thirty-three thousand, seven hundred thirty-eight".