20805348 has 24 divisors (see below), whose sum is σ = 51401952. Its totient is φ = 6527104.

The previous prime is 20805341. The next prime is 20805353. The reversal of 20805348 is 84350802.

It is a super-2 number, since 2×20805348² = 865725010802208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20805341) 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, 50790 + ... + 51197.

It is an arithmetic number, because the mean of its divisors is an integer number (2141748).

Almost surely, 2^20805348 is an apocalyptic number.

It is an amenable number.

20805348 is an abundant number, since it is smaller than the sum of its proper divisors (30596604).

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

20805348 is a wasteful number, since it uses less digits than its factorization.

20805348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102011 (or 102009 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20805348 is about 4561.2879759998. The cubic root of 20805348 is about 275.0373414857.

The spelling of 20805348 in words is "twenty million, eight hundred five thousand, three hundred forty-eight".