20700061 has 4 divisors (see below), whose sum is σ = 20747232. Its totient is φ = 20652892.

The previous prime is 20700059. The next prime is 20700073. The reversal of 20700061 is 16000702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20700061 - 2¹ = 20700059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20700011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22921 + ... + 23806.

It is an arithmetic number, because the mean of its divisors is an integer number (5186808).

Almost surely, 2^20700061 is an apocalyptic number.

It is an amenable number.

20700061 is a deficient number, since it is larger than the sum of its proper divisors (47171).

20700061 is an equidigital number, since it uses as much as digits as its factorization.

20700061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47170.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20700061 is about 4549.7319701275. The cubic root of 20700061 is about 274.5726077362.

Adding to 20700061 its reverse (16000702), we get a palindrome (36700763).

The spelling of 20700061 in words is "twenty million, seven hundred thousand, sixty-one".