20622687 has 4 divisors (see below), whose sum is σ = 27496920. Its totient is φ = 13748456.

The previous prime is 20622677. The next prime is 20622689. The reversal of 20622687 is 78622602.

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

It is a cyclic number.

It is not a de Polignac number, because 20622687 - 2¹⁹ = 20098399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20622689) 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, 3437112 + ... + 3437117.

It is an arithmetic number, because the mean of its divisors is an integer number (6874230).

Almost surely, 2^20622687 is an apocalyptic number.

20622687 is a deficient number, since it is larger than the sum of its proper divisors (6874233).

20622687 is an equidigital number, since it uses as much as digits as its factorization.

20622687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6874232.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 20622687 is about 4541.2208710874. The cubic root of 20622687 is about 274.2300756363.

The spelling of 20622687 in words is "twenty million, six hundred twenty-two thousand, six hundred eighty-seven".