20650770 has 48 divisors (see below), whose sum is σ = 61364160. Its totient is φ = 4720032.

The previous prime is 20650769. The next prime is 20650771. The reversal of 20650770 is 7705602.

20650770 is a `hidden beast` number, since 2 + 0 + 650 + 7 + 7 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (20650769) and next prime (20650771).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20650771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15760 + ... + 17019.

It is an arithmetic number, because the mean of its divisors is an integer number (1278420).

Almost surely, 2^20650770 is an apocalyptic number.

20650770 is an abundant number, since it is smaller than the sum of its proper divisors (40713390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20650770 is a wasteful number, since it uses less digits than its factorization.

20650770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32799 (or 32796 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 27.

The square root of 20650770 is about 4544.3118290892. The cubic root of 20650770 is about 274.3544970263.

The spelling of 20650770 in words is "twenty million, six hundred fifty thousand, seven hundred seventy".