21453035 has 8 divisors (see below), whose sum is σ = 25770096. Its totient is φ = 17144800.

The previous prime is 21453017. The next prime is 21453037. The reversal of 21453035 is 53035412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21453035 - 2¹⁴ = 21436651 is a prime.

It is a super-2 number, since 2×21453035² = 920465421422450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21453035.

It is not an unprimeable number, because it can be changed into a prime (21453037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5777 + ... + 8733.

It is an arithmetic number, because the mean of its divisors is an integer number (3221262).

Almost surely, 2^21453035 is an apocalyptic number.

21453035 is a deficient number, since it is larger than the sum of its proper divisors (4317061).

21453035 is a wasteful number, since it uses less digits than its factorization.

21453035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 21453035 is about 4631.7421128556. The cubic root of 21453035 is about 277.8622706820.

Adding to 21453035 its reverse (53035412), we get a palindrome (74488447).

The spelling of 21453035 in words is "twenty-one million, four hundred fifty-three thousand, thirty-five".