20318892 has 48 divisors (see below), whose sum is σ = 52617600. Its totient is φ = 6050560.

The previous prime is 20318891. The next prime is 20318897. The reversal of 20318892 is 29881302.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20318891) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6484 + ... + 9092.

It is an arithmetic number, because the mean of its divisors is an integer number (1096200).

Almost surely, 2^20318892 is an apocalyptic number.

20318892 is a gapful number since it is divisible by the number (22) 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 20318892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26308800).

20318892 is an abundant number, since it is smaller than the sum of its proper divisors (32298708).

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

20318892 is a wasteful number, since it uses less digits than its factorization.

20318892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2686 (or 2684 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 20318892 is about 4507.6481672819. The cubic root of 20318892 is about 272.8768380029.

The spelling of 20318892 in words is "twenty million, three hundred eighteen thousand, eight hundred ninety-two".