2025018721 has 4 divisors (see below), whose sum is σ = 2209111344. Its totient is φ = 1840926100.

The previous prime is 2025018679. The next prime is 2025018799. The reversal of 2025018721 is 1278105202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2025018721 - 2²¹ = 2022921569 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2025018721.

It is not an unprimeable number, because it can be changed into a prime (2025018521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92046295 + ... + 92046316.

It is an arithmetic number, because the mean of its divisors is an integer number (552277836).

Almost surely, 2^2025018721 is an apocalyptic number.

It is an amenable number.

2025018721 is a deficient number, since it is larger than the sum of its proper divisors (184092623).

2025018721 is a wasteful number, since it uses less digits than its factorization.

2025018721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184092622.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 2025018721 is about 45000.2080106304. The cubic root of 2025018721 is about 1265.1528966821.

The spelling of 2025018721 in words is "two billion, twenty-five million, eighteen thousand, seven hundred twenty-one".