2138203454 has 4 divisors (see below), whose sum is σ = 3207305184. Its totient is φ = 1069101726.

The previous prime is 2138203447. The next prime is 2138203481. The reversal of 2138203454 is 4543028312.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2138203454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534550862 + ... + 534550865.

It is an arithmetic number, because the mean of its divisors is an integer number (801826296).

Almost surely, 2^2138203454 is an apocalyptic number.

2138203454 is a deficient number, since it is larger than the sum of its proper divisors (1069101730).

2138203454 is a wasteful number, since it uses less digits than its factorization.

2138203454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069101729.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 2138203454 is about 46240.7120836174. The cubic root of 2138203454 is about 1288.2980286995.

The spelling of 2138203454 in words is "two billion, one hundred thirty-eight million, two hundred three thousand, four hundred fifty-four".