20769331 has 4 divisors (see below), whose sum is σ = 22657464. Its totient is φ = 18881200.

The previous prime is 20769319. The next prime is 20769361. The reversal of 20769331 is 13396702.

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 20769331 - 2⁹ = 20768819 is a prime.

It is a super-2 number, since 2×20769331² = 862730220375122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20769293 and 20769302.

It is not an unprimeable number, because it can be changed into a prime (20769311) 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, 944050 + ... + 944071.

It is an arithmetic number, because the mean of its divisors is an integer number (5664366).

Almost surely, 2^20769331 is an apocalyptic number.

20769331 is a deficient number, since it is larger than the sum of its proper divisors (1888133).

20769331 is a wasteful number, since it uses less digits than its factorization.

20769331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888132.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 20769331 is about 4557.3381485249. The cubic root of 20769331 is about 274.8785403020.

The spelling of 20769331 in words is "twenty million, seven hundred sixty-nine thousand, three hundred thirty-one".