2187021294 has 24 divisors (see below), whose sum is σ = 4891403712. Its totient is φ = 705490560.

The previous prime is 2187021269. The next prime is 2187021299. The reversal of 2187021294 is 4921207812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2187021299) 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 11 ways as a sum of consecutive naturals, for example, 1959139 + ... + 1960254.

It is an arithmetic number, because the mean of its divisors is an integer number (203808488).

Almost surely, 2^2187021294 is an apocalyptic number.

2187021294 is an abundant number, since it is smaller than the sum of its proper divisors (2704382418).

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

2187021294 is a wasteful number, since it uses less digits than its factorization.

2187021294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3919432 (or 3919429 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 2187021294 is about 46765.5994722617. The cubic root of 2187021294 is about 1298.0288260562.

The spelling of 2187021294 in words is "two billion, one hundred eighty-seven million, twenty-one thousand, two hundred ninety-four".