2158104021 has 8 divisors (see below), whose sum is σ = 2879148960. Its totient is φ = 1437897552.

The previous prime is 2158103993. The next prime is 2158104059. The reversal of 2158104021 is 1204018512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2158104021 - 2⁵ = 2158103989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2158103982 and 2158104000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158104061) 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, 203586 + ... + 213923.

It is an arithmetic number, because the mean of its divisors is an integer number (359893620).

Almost surely, 2^2158104021 is an apocalyptic number.

It is an amenable number.

2158104021 is a deficient number, since it is larger than the sum of its proper divisors (721044939).

2158104021 is a wasteful number, since it uses less digits than its factorization.

2158104021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419235.

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 2158104021 is about 46455.3981900920. The cubic root of 2158104021 is about 1292.2824845126.

The spelling of 2158104021 in words is "two billion, one hundred fifty-eight million, one hundred four thousand, twenty-one".