20770433 has 4 divisors (see below), whose sum is σ = 20922180. Its totient is φ = 20618688.

The previous prime is 20770429. The next prime is 20770457. The reversal of 20770433 is 33407702.

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 13191424 + 7579009 = 3632^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 20770433 - 2² = 20770429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20770423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75668 + ... + 75941.

It is an arithmetic number, because the mean of its divisors is an integer number (5230545).

Almost surely, 2^20770433 is an apocalyptic number.

It is an amenable number.

20770433 is a deficient number, since it is larger than the sum of its proper divisors (151747).

20770433 is a wasteful number, since it uses less digits than its factorization.

20770433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151746.

The product of its (nonzero) digits is 3528, while the sum is 26.

The square root of 20770433 is about 4557.4590508308. The cubic root of 20770433 is about 274.8834018098.

The spelling of 20770433 in words is "twenty million, seven hundred seventy thousand, four hundred thirty-three".