20069457 has 8 divisors (see below), whose sum is σ = 27264384. Its totient is φ = 13127088.

The previous prime is 20069443. The next prime is 20069471. The reversal of 20069457 is 75496002.

It is an interprime number because it is at equal distance from previous prime (20069443) and next prime (20069471).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20069457 - 2¹⁵ = 20036689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20069417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62953 + ... + 63270.

It is an arithmetic number, because the mean of its divisors is an integer number (3408048).

Almost surely, 2^20069457 is an apocalyptic number.

It is an amenable number.

20069457 is a deficient number, since it is larger than the sum of its proper divisors (7194927).

20069457 is a wasteful number, since it uses less digits than its factorization.

20069457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126279.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20069457 is about 4479.8947532280. The cubic root of 20069457 is about 271.7556241143.

The spelling of 20069457 in words is "twenty million, sixty-nine thousand, four hundred fifty-seven".