20788870 has 8 divisors (see below), whose sum is σ = 37419984. Its totient is φ = 8315544.

The previous prime is 20788847. The next prime is 20788877. The reversal of 20788870 is 7888702.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20788877) 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 3 ways as a sum of consecutive naturals, for example, 1039434 + ... + 1039453.

It is an arithmetic number, because the mean of its divisors is an integer number (4677498).

Almost surely, 2^20788870 is an apocalyptic number.

20788870 is a deficient number, since it is larger than the sum of its proper divisors (16631114).

20788870 is a wasteful number, since it uses less digits than its factorization.

20788870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078894.

The product of its (nonzero) digits is 50176, while the sum is 40.

The square root of 20788870 is about 4559.4813301515. The cubic root of 20788870 is about 274.9647117254.

The spelling of 20788870 in words is "twenty million, seven hundred eighty-eight thousand, eight hundred seventy".