2136154840 has 32 divisors (see below), whose sum is σ = 4820898960. Its totient is φ = 851875200.

The previous prime is 2136154829. The next prime is 2136154843. The reversal of 2136154840 is 484516312.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 2136154796 and 2136154805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136154843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67431 + ... + 93910.

Almost surely, 2^2136154840 is an apocalyptic number.

2136154840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2136154840 is an abundant number, since it is smaller than the sum of its proper divisors (2684744120).

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

2136154840 is a wasteful number, since it uses less digits than its factorization.

2136154840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161683 (or 161679 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 2136154840 is about 46218.5551483384. Note that the first 3 decimals coincide. The cubic root of 2136154840 is about 1287.8864575270.

The spelling of 2136154840 in words is "two billion, one hundred thirty-six million, one hundred fifty-four thousand, eight hundred forty".