21035722 has 16 divisors (see below), whose sum is σ = 32240160. Its totient is φ = 10291248.

The previous prime is 21035699. The next prime is 21035737. The reversal of 21035722 is 22753012.

It is a super-3 number, since 3×21035722³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 21035693 and 21035702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23548 + ... + 24424.

It is an arithmetic number, because the mean of its divisors is an integer number (2015010).

Almost surely, 2^21035722 is an apocalyptic number.

21035722 is a deficient number, since it is larger than the sum of its proper divisors (11204438).

21035722 is a wasteful number, since it uses less digits than its factorization.

21035722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 21035722 is about 4586.4716286052. The cubic root of 21035722 is about 276.0487644005.

Adding to 21035722 its reverse (22753012), we get a palindrome (43788734).

The spelling of 21035722 in words is "twenty-one million, thirty-five thousand, seven hundred twenty-two".