2136797820 has 240 divisors, whose sum is σ = 7007793408. Its totient is φ = 544527360.

The previous prime is 2136797777. The next prime is 2136797827. The reversal of 2136797820 is 287976312.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136797827) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3519957 + ... + 3520563.

Almost surely, 2^2136797820 is an apocalyptic number.

2136797820 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 2136797820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3503896704).

2136797820 is an abundant number, since it is smaller than the sum of its proper divisors (4870995588).

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

2136797820 is a wasteful number, since it uses less digits than its factorization.

2136797820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 2136797820 is about 46225.5104893391. The cubic root of 2136797820 is about 1288.0156619818.

The spelling of 2136797820 in words is "two billion, one hundred thirty-six million, seven hundred ninety-seven thousand, eight hundred twenty".