2143021491928 has 32 divisors (see below), whose sum is σ = 4021230913200. Its totient is φ = 1070693471232.

The previous prime is 2143021491911. The next prime is 2143021491929. The reversal of 2143021491928 is 8291941203412.

It is a super-2 number, since 2×2143021491928² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143021491929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130911328 + ... + 130927696.

Almost surely, 2^{2143021491928} is an apocalyptic number.

It is an amenable number.

2143021491928 is a deficient number, since it is larger than the sum of its proper divisors (1878209421272).

2143021491928 is a wasteful number, since it uses less digits than its factorization.

2143021491928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27859 (or 27855 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 2143021491928 in words is "two trillion, one hundred forty-three billion, twenty-one million, four hundred ninety-one thousand, nine hundred twenty-eight".