2161507020 has 24 divisors (see below), whose sum is σ = 6052219824. Its totient is φ = 576401856.

The previous prime is 2161506983. The next prime is 2161507027. The reversal of 2161507020 is 207051612.

2161507020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2161507020² = 9344225195018560800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2161507027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18012499 + ... + 18012618.

It is an arithmetic number, because the mean of its divisors is an integer number (252175826).

Almost surely, 2^2161507020 is an apocalyptic number.

2161507020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2161507020 is an abundant number, since it is smaller than the sum of its proper divisors (3890712804).

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

2161507020 is a wasteful number, since it uses less digits than its factorization.

2161507020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36025129 (or 36025127 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 2161507020 is about 46492.0102813376. The cubic root of 2161507020 is about 1292.9613715537.

Adding to 2161507020 its reverse (207051612), we get a palindrome (2368558632).

The spelling of 2161507020 in words is "two billion, one hundred sixty-one million, five hundred seven thousand, twenty".