20788867 has 8 divisors (see below), whose sum is σ = 22990320. Its totient is φ = 18639360.

The previous prime is 20788847. The next prime is 20788877. The reversal of 20788867 is 76888702.

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 20788867 - 2¹¹ = 20786819 is a prime.

It is a super-2 number, since 2×20788867² = 864353982287378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20788837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12142 + ... + 13747.

It is an arithmetic number, because the mean of its divisors is an integer number (2873790).

Almost surely, 2^20788867 is an apocalyptic number.

20788867 is a deficient number, since it is larger than the sum of its proper divisors (2201453).

20788867 is a wasteful number, since it uses less digits than its factorization.

20788867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25973.

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 20788867 is about 4559.4810011667. The cubic root of 20788867 is about 274.9646984989.

It can be divided in two parts, 20 and 788867, that added together give a palindrome (788887).

The spelling of 20788867 in words is "twenty million, seven hundred eighty-eight thousand, eight hundred sixty-seven".