20152500 has 60 divisors (see below), whose sum is σ = 58781184. Its totient is φ = 5372000.

The previous prime is 20152493. The next prime is 20152523. The reversal of 20152500 is 525102.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×20152500² = 812246512500000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20152500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6157 + ... + 8843.

Almost surely, 2^20152500 is an apocalyptic number.

20152500 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 20152500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29390592).

20152500 is an abundant number, since it is smaller than the sum of its proper divisors (38628684).

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

20152500 is a wasteful number, since it uses less digits than its factorization.

20152500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714 (or 2697 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 20152500 is about 4489.1535950555. The cubic root of 20152500 is about 272.1299299950.

Adding to 20152500 its reverse (525102), we get a palindrome (20677602).

The spelling of 20152500 in words is "twenty million, one hundred fifty-two thousand, five hundred".