21849334 has 24 divisors (see below), whose sum is σ = 35838720. Its totient is φ = 9985248.

The previous prime is 21849329. The next prime is 21849343. The reversal of 21849334 is 43394812.

21849334 = T₁ + T₂ + ... + T₅₀₇.

21849334 is a nontrivial binomial coefficient, being equal to C(509, 3).

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21849334.

It is a congruent number.

It is an unprimeable number.

It is the 507-th tetrahedral number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42672 + ... + 43180.

It is an arithmetic number, because the mean of its divisors is an integer number (1493280).

Almost surely, 2^21849334 is an apocalyptic number.

21849334 is a deficient number, since it is larger than the sum of its proper divisors (13989386).

21849334 is a wasteful number, since it uses less digits than its factorization.

21849334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 651 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 21849334 is about 4674.3271173507. The cubic root of 21849334 is about 279.5628126361.

The spelling of 21849334 in words is "twenty-one million, eight hundred forty-nine thousand, three hundred thirty-four".