21652629 has 8 divisors (see below), whose sum is σ = 28977792. Its totient is φ = 14381280.

The previous prime is 21652537. The next prime is 21652639. The reversal of 21652629 is 92625612.

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

It is not a de Polignac number, because 21652629 - 2¹⁷ = 21521557 is a prime.

It is a super-2 number, since 2×21652629² = 937672685223282, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 21652629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21652639) 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 7 ways as a sum of consecutive naturals, for example, 12504 + ... + 14129.

It is an arithmetic number, because the mean of its divisors is an integer number (3622224).

Almost surely, 2^21652629 is an apocalyptic number.

It is an amenable number.

21652629 is a deficient number, since it is larger than the sum of its proper divisors (7325163).

21652629 is a wasteful number, since it uses less digits than its factorization.

21652629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26907.

The product of its digits is 12960, while the sum is 33.

The square root of 21652629 is about 4653.2385496555. The cubic root of 21652629 is about 278.7213337638.

The spelling of 21652629 in words is "twenty-one million, six hundred fifty-two thousand, six hundred twenty-nine".