20339040 has 48 divisors (see below), whose sum is σ = 64069488. Its totient is φ = 5423616.

The previous prime is 20339029. The next prime is 20339051. The reversal of 20339040 is 4093302.

It is an interprime number because it is at equal distance from previous prime (20339029) and next prime (20339051).

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 20338998 and 20339016.

It is a congruent number.

It is an unprimeable number.

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, 20707 + ... + 21666.

It is an arithmetic number, because the mean of its divisors is an integer number (1334781).

Almost surely, 2^20339040 is an apocalyptic number.

20339040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20339040 is an abundant number, since it is smaller than the sum of its proper divisors (43730448).

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

20339040 is a wasteful number, since it uses less digits than its factorization.

20339040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42391 (or 42383 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 20339040 is about 4509.8824818392. The cubic root of 20339040 is about 272.9670021435.

The spelling of 20339040 in words is "twenty million, three hundred thirty-nine thousand, forty".