20349500 has 24 divisors (see below), whose sum is σ = 44444400. Its totient is φ = 8139600.

The previous prime is 20349491. The next prime is 20349557. The reversal of 20349500 is 594302.

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, 19850 + ... + 20849.

It is an arithmetic number, because the mean of its divisors is an integer number (1851850).

Almost surely, 2^20349500 is an apocalyptic number.

20349500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20349500 is an abundant number, since it is smaller than the sum of its proper divisors (24094900).

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

20349500 is a wasteful number, since it uses less digits than its factorization.

20349500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40718 (or 40706 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 20349500 is about 4511.0420082283. The cubic root of 20349500 is about 273.0137881196.

The spelling of 20349500 in words is "twenty million, three hundred forty-nine thousand, five hundred".