20120004025 has 27 divisors (see below), whose sum is σ = 27433703983. Its totient is φ = 14627056400.

The previous prime is 20120004017. The next prime is 20120004089. The reversal of 20120004025 is 52040002102.

The square root of 20120004025 is 141845.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7243201449 + 12876802576 = 85107^2 + 113476^2 .

It is not a de Polignac number, because 20120004025 - 2³ = 20120004017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7800186 + ... + 7802764.

Almost surely, 2^20120004025 is an apocalyptic number.

20120004025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20120004025 is the 141845-th square number.

20120004025 is the 70923-rd centered octagonal number.

It is an amenable number.

20120004025 is a deficient number, since it is larger than the sum of its proper divisors (7313699958).

20120004025 is an frugal number, since it uses more digits than its factorization.

20120004025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190 (or 2595 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

Multiplying 20120004025 by its sum of digits (16), we get a square (321920064400 = 567380²).

Adding to 20120004025 its reverse (52040002102), we get a palindrome (72160006127).

The spelling of 20120004025 in words is "twenty billion, one hundred twenty million, four thousand, twenty-five".