2120154040 has 64 divisors (see below), whose sum is σ = 4965559200. Its totient is φ = 813722112.

The previous prime is 2120154037. The next prime is 2120154041. The reversal of 2120154040 is 404510212.

It is a junction number, because it is equal to n+sod(n) for n = 2120153999 and 2120154017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120154041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183474 + ... + 194686.

Almost surely, 2^2120154040 is an apocalyptic number.

2120154040 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 2120154040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2482779600).

2120154040 is an abundant number, since it is smaller than the sum of its proper divisors (2845405160).

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

2120154040 is a wasteful number, since it uses less digits than its factorization.

2120154040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11416 (or 11412 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 2120154040 is about 46045.1304700074. The cubic root of 2120154040 is about 1284.6627708993.

Adding to 2120154040 its reverse (404510212), we get a palindrome (2524664252).

The spelling of 2120154040 in words is "two billion, one hundred twenty million, one hundred fifty-four thousand, forty".