20914785 has 12 divisors (see below), whose sum is σ = 36252372. Its totient is φ = 11154528.

The previous prime is 20914783. The next prime is 20914837. The reversal of 20914785 is 58741902.

It can be written as a sum of positive squares in 2 ways, for example, as 11532816 + 9381969 = 3396^2 + 3063^2 .

It is not a de Polignac number, because 20914785 - 2¹ = 20914783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20914783) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 232342 + ... + 232431.

It is an arithmetic number, because the mean of its divisors is an integer number (3021031).

Almost surely, 2^20914785 is an apocalyptic number.

It is an amenable number.

20914785 is a deficient number, since it is larger than the sum of its proper divisors (15337587).

20914785 is a wasteful number, since it uses less digits than its factorization.

20914785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464784 (or 464781 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 20914785 is about 4573.2685248081. The cubic root of 20914785 is about 275.5187343911.

The spelling of 20914785 in words is "twenty million, nine hundred fourteen thousand, seven hundred eighty-five".