20365340 has 24 divisors (see below), whose sum is σ = 45018960. Its totient is φ = 7717248.

The previous prime is 20365333. The next prime is 20365349. The reversal of 20365340 is 4356302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20365349) 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, 26417 + ... + 27176.

It is an arithmetic number, because the mean of its divisors is an integer number (1875790).

Almost surely, 2^20365340 is an apocalyptic number.

20365340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20365340 is an abundant number, since it is smaller than the sum of its proper divisors (24653620).

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

20365340 is a wasteful number, since it uses less digits than its factorization.

20365340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53621 (or 53619 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20365340 is about 4512.7973586236. The cubic root of 20365340 is about 273.0846074979.

The spelling of 20365340 in words is "twenty million, three hundred sixty-five thousand, three hundred forty".