20700159 has 4 divisors (see below), whose sum is σ = 27600216. Its totient is φ = 13800104.

The previous prime is 20700143. The next prime is 20700181. The reversal of 20700159 is 95100702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20700159 - 2⁴ = 20700143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20700109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3450024 + ... + 3450029.

It is an arithmetic number, because the mean of its divisors is an integer number (6900054).

Almost surely, 2^20700159 is an apocalyptic number.

20700159 is a deficient number, since it is larger than the sum of its proper divisors (6900057).

20700159 is an equidigital number, since it uses as much as digits as its factorization.

20700159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6900056.

The product of its (nonzero) digits is 630, while the sum is 24.

The square root of 20700159 is about 4549.7427399799. The cubic root of 20700159 is about 274.5730410372.

The spelling of 20700159 in words is "twenty million, seven hundred thousand, one hundred fifty-nine".