20239460 has 12 divisors (see below), whose sum is σ = 42502908. Its totient is φ = 8095776.

The previous prime is 20239433. The next prime is 20239463. The reversal of 20239460 is 6493202.

It can be written as a sum of positive squares in 2 ways, for example, as 9375844 + 10863616 = 3062^2 + 3296^2 .

It is not an unprimeable number, because it can be changed into a prime (20239463) 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 3 ways as a sum of consecutive naturals, for example, 505967 + ... + 506006.

It is an arithmetic number, because the mean of its divisors is an integer number (3541909).

Almost surely, 2^20239460 is an apocalyptic number.

20239460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20239460 is an abundant number, since it is smaller than the sum of its proper divisors (22263448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20239460 is a wasteful number, since it uses less digits than its factorization.

20239460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011982 (or 1011980 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20239460 is about 4498.8287364602. The cubic root of 20239460 is about 272.5207907151.

The spelling of 20239460 in words is "twenty million, two hundred thirty-nine thousand, four hundred sixty".