20629087 has 4 divisors (see below), whose sum is σ = 20841856. Its totient is φ = 20416320.

The previous prime is 20629073. The next prime is 20629097. The reversal of 20629087 is 78092602.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20629087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20629067) 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, 106239 + ... + 106432.

It is an arithmetic number, because the mean of its divisors is an integer number (5210464).

Almost surely, 2^20629087 is an apocalyptic number.

20629087 is a deficient number, since it is larger than the sum of its proper divisors (212769).

20629087 is an equidigital number, since it uses as much as digits as its factorization.

20629087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212768.

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

The square root of 20629087 is about 4541.9254727483. The cubic root of 20629087 is about 274.2584406914.

The spelling of 20629087 in words is "twenty million, six hundred twenty-nine thousand, eighty-seven".