20148500 has 48 divisors (see below), whose sum is σ = 44815680. Its totient is φ = 7911200.

The previous prime is 20148497. The next prime is 20148503. The reversal of 20148500 is 584102.

It is an interprime number because it is at equal distance from previous prime (20148497) and next prime (20148503).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20148503) 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, 29159 + ... + 29841.

It is an arithmetic number, because the mean of its divisors is an integer number (933660).

Almost surely, 2^20148500 is an apocalyptic number.

20148500 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 20148500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22407840).

20148500 is an abundant number, since it is smaller than the sum of its proper divisors (24667180).

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

20148500 is a wasteful number, since it uses less digits than its factorization.

20148500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 20148500 is about 4488.7080546634. The cubic root of 20148500 is about 272.1119240942. Note that the first 3 decimals are identical.

The spelling of 20148500 in words is "twenty million, one hundred forty-eight thousand, five hundred".