21701084 has 6 divisors (see below), whose sum is σ = 37976904. Its totient is φ = 10850540.

The previous prime is 21701083. The next prime is 21701089. The reversal of 21701084 is 48010712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21701083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2712632 + ... + 2712639.

It is an arithmetic number, because the mean of its divisors is an integer number (6329484).

Almost surely, 2^21701084 is an apocalyptic number.

It is an amenable number.

21701084 is a deficient number, since it is larger than the sum of its proper divisors (16275820).

21701084 is a wasteful number, since it uses less digits than its factorization.

21701084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5425275 (or 5425273 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 21701084 is about 4658.4422289001. The cubic root of 21701084 is about 278.9290896044.

Adding to 21701084 its reverse (48010712), we get a palindrome (69711796).

The spelling of 21701084 in words is "twenty-one million, seven hundred one thousand, eighty-four".