20081502 has 48 divisors (see below), whose sum is σ = 50798592. Its totient is φ = 5613840.

The previous prime is 20081483. The next prime is 20081519. The reversal of 20081502 is 20518002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4227 + ... + 7617.

It is an arithmetic number, because the mean of its divisors is an integer number (1058304).

Almost surely, 2^20081502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20081502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25399296).

20081502 is an abundant number, since it is smaller than the sum of its proper divisors (30717090).

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

20081502 is a wasteful number, since it uses less digits than its factorization.

20081502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3453 (or 3450 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 20081502 is about 4481.2388911996. The cubic root of 20081502 is about 271.8099793778.

Adding to 20081502 its reverse (20518002), we get a palindrome (40599504).

The spelling of 20081502 in words is "twenty million, eighty-one thousand, five hundred two".