21701460 has 96 divisors (see below), whose sum is σ = 67060224. Its totient is φ = 5200000.

The previous prime is 21701453. The next prime is 21701461. The reversal of 21701460 is 6410712.

It is a super-2 number, since 2×21701460² = 941906732263200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21701461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86335 + ... + 86585.

It is an arithmetic number, because the mean of its divisors is an integer number (698544).

Almost surely, 2^21701460 is an apocalyptic number.

21701460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21701460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33530112).

21701460 is an abundant number, since it is smaller than the sum of its proper divisors (45358764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21701460 is a wasteful number, since it uses less digits than its factorization.

21701460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 21701460 is about 4658.4825855637. The cubic root of 21701460 is about 278.9307005336.

The spelling of 21701460 in words is "twenty-one million, seven hundred one thousand, four hundred sixty".