20502770 has 8 divisors (see below), whose sum is σ = 36905004. Its totient is φ = 8201104.

The previous prime is 20502751. The next prime is 20502803. The reversal of 20502770 is 7720502.

It can be written as a sum of positive squares in 2 ways, for example, as 20151121 + 351649 = 4489^2 + 593^2 .

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

It is an unprimeable number.

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, 1025129 + ... + 1025148.

Almost surely, 2^20502770 is an apocalyptic number.

20502770 is a deficient number, since it is larger than the sum of its proper divisors (16402234).

20502770 is a wasteful number, since it uses less digits than its factorization.

20502770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050284.

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 20502770 is about 4527.9984540633. The cubic root of 20502770 is about 273.6975101434.

The spelling of 20502770 in words is "twenty million, five hundred two thousand, seven hundred seventy".