2136730981 has 24 divisors (see below), whose sum is σ = 2784890304. Its totient is φ = 1592564160.

The previous prime is 2136730963. The next prime is 2136730993. The reversal of 2136730981 is 1890376312.

It is not a de Polignac number, because 2136730981 - 2⁷ = 2136730853 is a prime.

It is a super-2 number, since 2×2136730981² = 9131238570330444722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2136730381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14505 + ... + 66961.

It is an arithmetic number, because the mean of its divisors is an integer number (116037096).

Almost surely, 2^2136730981 is an apocalyptic number.

It is an amenable number.

2136730981 is a deficient number, since it is larger than the sum of its proper divisors (648159323).

2136730981 is a wasteful number, since it uses less digits than its factorization.

2136730981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52521 (or 52498 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 2136730981 is about 46224.7875170887. The cubic root of 2136730981 is about 1288.0022321390.

The spelling of 2136730981 in words is "two billion, one hundred thirty-six million, seven hundred thirty thousand, nine hundred eighty-one".