20270069 has 4 divisors (see below), whose sum is σ = 21462444. Its totient is φ = 19077696.

The previous prime is 20270059. The next prime is 20270077. The reversal of 20270069 is 96007202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14326225 + 5943844 = 3785^2 + 2438^2 .

It is a cyclic number.

It is not a de Polignac number, because 20270069 - 2¹⁶ = 20204533 is a prime.

It is a super-2 number, since 2×20270069² = 821751394529522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20270039) 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, 596162 + ... + 596195.

It is an arithmetic number, because the mean of its divisors is an integer number (5365611).

Almost surely, 2^20270069 is an apocalyptic number.

It is an amenable number.

20270069 is a deficient number, since it is larger than the sum of its proper divisors (1192375).

20270069 is a wasteful number, since it uses less digits than its factorization.

20270069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192374.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20270069 is about 4502.2293366731. The cubic root of 20270069 is about 272.6581031286.

The spelling of 20270069 in words is "twenty million, two hundred seventy thousand, sixty-nine".