2129641854 has 16 divisors (see below), whose sum is σ = 4406155920. Its totient is φ = 685401920.

The previous prime is 2129641831. The next prime is 2129641859. The reversal of 2129641854 is 4581469212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129641859) 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, 6119487 + ... + 6119834.

It is an arithmetic number, because the mean of its divisors is an integer number (275384745).

Almost surely, 2^2129641854 is an apocalyptic number.

2129641854 is an abundant number, since it is smaller than the sum of its proper divisors (2276514066).

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

2129641854 is a wasteful number, since it uses less digits than its factorization.

2129641854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12239355.

The product of its digits is 138240, while the sum is 42.

The square root of 2129641854 is about 46148.0427970678. The cubic root of 2129641854 is about 1286.5762332597.

The spelling of 2129641854 in words is "two billion, one hundred twenty-nine million, six hundred forty-one thousand, eight hundred fifty-four".