20283913 has 8 divisors (see below), whose sum is σ = 21883400. Its totient is φ = 18690048.

The previous prime is 20283911. The next prime is 20283943. The reversal of 20283913 is 31938202.

It can be written as a sum of positive squares in 4 ways, for example, as 4507129 + 15776784 = 2123^2 + 3972^2 .

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

It is not a de Polignac number, because 20283913 - 2¹ = 20283911 is a prime.

It is a super-2 number, since 2×20283913² = 822874253183138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20283911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8983 + ... + 11011.

It is an arithmetic number, because the mean of its divisors is an integer number (2735425).

Almost surely, 2^20283913 is an apocalyptic number.

It is an amenable number.

20283913 is a deficient number, since it is larger than the sum of its proper divisors (1599487).

20283913 is a wasteful number, since it uses less digits than its factorization.

20283913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 20283913 is about 4503.7665348017. The cubic root of 20283913 is about 272.7201621143.

The spelling of 20283913 in words is "twenty million, two hundred eighty-three thousand, nine hundred thirteen".