21472653 has 16 divisors (see below), whose sum is σ = 29154816. Its totient is φ = 14055600.

The previous prime is 21472631. The next prime is 21472657. The reversal of 21472653 is 35627412.

It is not a de Polignac number, because 21472653 - 2⁵ = 21472621 is a prime.

It is a super-2 number, since 2×21472653² = 922149653716818, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21472653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21472657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48250 + ... + 48692.

It is an arithmetic number, because the mean of its divisors is an integer number (1822176).

Almost surely, 2^21472653 is an apocalyptic number.

It is an amenable number.

21472653 is a deficient number, since it is larger than the sum of its proper divisors (7682163).

21472653 is a wasteful number, since it uses less digits than its factorization.

21472653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704.

The product of its digits is 10080, while the sum is 30.

The square root of 21472653 is about 4633.8594065854. The cubic root of 21472653 is about 277.9469431034.

The spelling of 21472653 in words is "twenty-one million, four hundred seventy-two thousand, six hundred fifty-three".