20597629 has 4 divisors (see below), whose sum is σ = 22182076. Its totient is φ = 19013184.

The previous prime is 20597623. The next prime is 20597639. The reversal of 20597629 is 92679502.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92679502 = 2 ⋅46339751.

It can be written as a sum of positive squares in 2 ways, for example, as 3992004 + 16605625 = 1998^2 + 4075^2 .

It is a cyclic number.

It is not a de Polignac number, because 20597629 - 2²¹ = 18500477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20597591 and 20597600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20597623) 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, 792204 + ... + 792229.

It is an arithmetic number, because the mean of its divisors is an integer number (5545519).

Almost surely, 2^20597629 is an apocalyptic number.

It is an amenable number.

20597629 is a deficient number, since it is larger than the sum of its proper divisors (1584447).

20597629 is a wasteful number, since it uses less digits than its factorization.

20597629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1584446.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 20597629 is about 4538.4610827901. The cubic root of 20597629 is about 274.1189610776.

The spelling of 20597629 in words is "twenty million, five hundred ninety-seven thousand, six hundred twenty-nine".