20071969 has 4 divisors (see below), whose sum is σ = 20230144. Its totient is φ = 19913796.

The previous prime is 20071963. The next prime is 20071991. The reversal of 20071969 is 96917002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20071969 - 2²³ = 11683361 is a prime.

It is a super-2 number, since 2×20071969² = 805767879073922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20071963) 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, 78897 + ... + 79150.

It is an arithmetic number, because the mean of its divisors is an integer number (5057536).

Almost surely, 2^20071969 is an apocalyptic number.

It is an amenable number.

20071969 is a deficient number, since it is larger than the sum of its proper divisors (158175).

20071969 is a wasteful number, since it uses less digits than its factorization.

20071969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158174.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 20071969 is about 4480.1751081849. The cubic root of 20071969 is about 271.7669617678.

The spelling of 20071969 in words is "twenty million, seventy-one thousand, nine hundred sixty-nine".