2193861870 has 24 divisors (see below), whose sum is σ = 5704041096. Its totient is φ = 585029808.

The previous prime is 2193861863. The next prime is 2193861871. The reversal of 2193861870 is 781683912.

2193861870 is a `hidden beast` number, since 21 + 9 + 3 + 8 + 618 + 7 + 0 = 666.

2193861870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (2193861871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12188032 + ... + 12188211.

It is an arithmetic number, because the mean of its divisors is an integer number (237668379).

Almost surely, 2^2193861870 is an apocalyptic number.

2193861870 is an abundant number, since it is smaller than the sum of its proper divisors (3510179226).

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

2193861870 is a wasteful number, since it uses less digits than its factorization.

2193861870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24376256 (or 24376253 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 2193861870 is about 46838.6792085345. The cubic root of 2193861870 is about 1299.3807445120.

The spelling of 2193861870 in words is "two billion, one hundred ninety-three million, eight hundred sixty-one thousand, eight hundred seventy".