21734463 has 16 divisors (see below), whose sum is σ = 29546496. Its totient is φ = 14208960.

The previous prime is 21734459. The next prime is 21734467. The reversal of 21734463 is 36443712.

It is an interprime number because it is at equal distance from previous prime (21734459) and next prime (21734467).

It is not a de Polignac number, because 21734463 - 2² = 21734459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21734463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21734467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47331 + ... + 47787.

It is an arithmetic number, because the mean of its divisors is an integer number (1846656).

Almost surely, 2^21734463 is an apocalyptic number.

21734463 is a deficient number, since it is larger than the sum of its proper divisors (7812033).

21734463 is a wasteful number, since it uses less digits than its factorization.

21734463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734.

The product of its digits is 12096, while the sum is 30.

The square root of 21734463 is about 4662.0234877143. The cubic root of 21734463 is about 279.0720256999.

The spelling of 21734463 in words is "twenty-one million, seven hundred thirty-four thousand, four hundred sixty-three".