20087629 has 8 divisors (see below), whose sum is σ = 20467512. Its totient is φ = 19710720.

The previous prime is 20087603. The next prime is 20087647. The reversal of 20087629 is 92678002.

It can be written as a sum of positive squares in 4 ways, for example, as 4862025 + 15225604 = 2205^2 + 3902^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20087629 - 2¹⁷ = 19956557 is a prime.

It is a super-4 number, since 4×20087629⁴ (a number of 30 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20087594 and 20087603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20087429) 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, 16419 + ... + 17599.

It is an arithmetic number, because the mean of its divisors is an integer number (2558439).

Almost surely, 2^20087629 is an apocalyptic number.

It is an amenable number.

20087629 is a deficient number, since it is larger than the sum of its proper divisors (379883).

20087629 is a wasteful number, since it uses less digits than its factorization.

20087629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 20087629 is about 4481.9224669778. The cubic root of 20087629 is about 271.8376202452.

The spelling of 20087629 in words is "twenty million, eighty-seven thousand, six hundred twenty-nine".