20339620 has 24 divisors (see below), whose sum is σ = 48815424. Its totient is φ = 6973536.

The previous prime is 20339611. The next prime is 20339621. The reversal of 20339620 is 2693302.

It is not an unprimeable number, because it can be changed into a prime (20339621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72502 + ... + 72781.

It is an arithmetic number, because the mean of its divisors is an integer number (2033976).

Almost surely, 2^20339620 is an apocalyptic number.

20339620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20339620 is an abundant number, since it is smaller than the sum of its proper divisors (28475804).

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

20339620 is a wasteful number, since it uses less digits than its factorization.

20339620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145299 (or 145297 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 20339620 is about 4509.9467846084. The cubic root of 20339620 is about 272.9695968146.

The spelling of 20339620 in words is "twenty million, three hundred thirty-nine thousand, six hundred twenty".