2015154020 has 96 divisors (see below), whose sum is σ = 4719254400. Its totient is φ = 716672000.

The previous prime is 2015154013. The next prime is 2015154047. The reversal of 2015154020 is 204515102.

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

It is a junction number, because it is equal to n+sod(n) for n = 2015153983 and 2015154001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1977071 + ... + 1978089.

It is an arithmetic number, because the mean of its divisors is an integer number (49158900).

Almost surely, 2^2015154020 is an apocalyptic number.

2015154020 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 2015154020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2359627200).

2015154020 is an abundant number, since it is smaller than the sum of its proper divisors (2704100380).

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

2015154020 is a wasteful number, since it uses less digits than its factorization.

2015154020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 2015154020 is about 44890.4669167074. The cubic root of 2015154020 is about 1263.0951913069.

Adding to 2015154020 its reverse (204515102), we get a palindrome (2219669122).

The spelling of 2015154020 in words is "two billion, fifteen million, one hundred fifty-four thousand, twenty".