20769433 has 4 divisors (see below), whose sum is σ = 20814948. Its totient is φ = 20723920.

The previous prime is 20769409. The next prime is 20769443. The reversal of 20769433 is 33496702.

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 10478169 + 10291264 = 3237^2 + 3208^2 .

It is a cyclic number.

It is not a de Polignac number, because 20769433 - 2⁵ = 20769401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20769403) 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, 22066 + ... + 22987.

It is an arithmetic number, because the mean of its divisors is an integer number (5203737).

Almost surely, 2^20769433 is an apocalyptic number.

It is an amenable number.

20769433 is a deficient number, since it is larger than the sum of its proper divisors (45515).

20769433 is an equidigital number, since it uses as much as digits as its factorization.

20769433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45514.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 20769433 is about 4557.3493392541. The cubic root of 20769433 is about 274.8789902854.

The spelling of 20769433 in words is "twenty million, seven hundred sixty-nine thousand, four hundred thirty-three".