21035454 has 48 divisors (see below), whose sum is σ = 47246976. Its totient is φ = 6190800.

The previous prime is 21035449. The next prime is 21035459. The reversal of 21035454 is 45453012.

It is an interprime number because it is at equal distance from previous prime (21035449) and next prime (21035459).

It is a super-2 number, since 2×21035454² = 884980649972232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21035459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296239 + ... + 296309.

It is an arithmetic number, because the mean of its divisors is an integer number (984312).

Almost surely, 2^21035454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21035454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23623488).

21035454 is an abundant number, since it is smaller than the sum of its proper divisors (26211522).

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

21035454 is a wasteful number, since it uses less digits than its factorization.

21035454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 21035454 is about 4586.4424121535. The cubic root of 21035454 is about 276.0475920870.

Adding to 21035454 its reverse (45453012), we get a palindrome (66488466).

It can be divided in two parts, 2103 and 5454, that added together give a palindrome (7557).

The spelling of 21035454 in words is "twenty-one million, thirty-five thousand, four hundred fifty-four".