20057969 has 4 divisors (see below), whose sum is σ = 20077044. Its totient is φ = 20038896.

The previous prime is 20057963. The next prime is 20057971. The reversal of 20057969 is 96975002.

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 11992369 + 8065600 = 3463^2 + 2840^2 .

It is a cyclic number.

It is not a de Polignac number, because 20057969 - 2⁴ = 20057953 is a prime.

It is a super-2 number, since 2×20057969² = 804644240809922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20057963) 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, 7862 + ... + 10095.

It is an arithmetic number, because the mean of its divisors is an integer number (5019261).

Almost surely, 2^20057969 is an apocalyptic number.

It is an amenable number.

20057969 is a deficient number, since it is larger than the sum of its proper divisors (19075).

20057969 is a wasteful number, since it uses less digits than its factorization.

20057969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19074.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 20057969 is about 4478.6123967140. The cubic root of 20057969 is about 271.7037621486.

The spelling of 20057969 in words is "twenty million, fifty-seven thousand, nine hundred sixty-nine".