20369860 has 48 divisors (see below), whose sum is σ = 49504896. Its totient is φ = 6895872.

The previous prime is 20369857. The next prime is 20369863. The reversal of 20369860 is 6896302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20369857) and next prime (20369863).

It is not an unprimeable number, because it can be changed into a prime (20369863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10744 + ... + 12496.

It is an arithmetic number, because the mean of its divisors is an integer number (1031352).

Almost surely, 2^20369860 is an apocalyptic number.

20369860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20369860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24752448).

20369860 is an abundant number, since it is smaller than the sum of its proper divisors (29135036).

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

20369860 is a wasteful number, since it uses less digits than its factorization.

20369860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852 (or 1850 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 20369860 is about 4513.2981288632. The cubic root of 20369860 is about 273.1048093232.

The spelling of 20369860 in words is "twenty million, three hundred sixty-nine thousand, eight hundred sixty".