2139740836 has 24 divisors (see below), whose sum is σ = 3967772256. Its totient is φ = 1006185600.

The previous prime is 2139740797. The next prime is 2139740851. The reversal of 2139740836 is 6380479312.

It is a junction number, because it is equal to n+sod(n) for n = 2139740792 and 2139740801.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86011 + ... + 108061.

It is an arithmetic number, because the mean of its divisors is an integer number (165323844).

Almost surely, 2^2139740836 is an apocalyptic number.

It is an amenable number.

2139740836 is a deficient number, since it is larger than the sum of its proper divisors (1828031420).

2139740836 is a wasteful number, since it uses less digits than its factorization.

2139740836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23499 (or 23497 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 2139740836 is about 46257.3327808684. The cubic root of 2139740836 is about 1288.6067195768.

The spelling of 2139740836 in words is "two billion, one hundred thirty-nine million, seven hundred forty thousand, eight hundred thirty-six".