20696629 has 4 divisors (see below), whose sum is σ = 21035980. Its totient is φ = 20357280.

The previous prime is 20696587. The next prime is 20696699. The reversal of 20696629 is 92669602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2634129 + 18062500 = 1623^2 + 4250^2 .

It is a cyclic number.

It is not a de Polignac number, because 20696629 - 2¹⁵ = 20663861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20696591 and 20696600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20696699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169584 + ... + 169705.

It is an arithmetic number, because the mean of its divisors is an integer number (5258995).

Almost surely, 2^20696629 is an apocalyptic number.

It is an amenable number.

20696629 is a deficient number, since it is larger than the sum of its proper divisors (339351).

20696629 is an equidigital number, since it uses as much as digits as its factorization.

20696629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339350.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 20696629 is about 4549.3547894179. The cubic root of 20696629 is about 274.5574324947.

The spelling of 20696629 in words is "twenty million, six hundred ninety-six thousand, six hundred twenty-nine".