20025363121 has 3 divisors (see below), whose sum is σ = 20025504633. Its totient is φ = 20025221610.

The previous prime is 20025363119. The next prime is 20025363151. The reversal of 20025363121 is 12136352002.

The square root of 20025363121 is 141511.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12136352002 = 2 ⋅6068176001.

It is not a de Polignac number, because 20025363121 - 2¹ = 20025363119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20025363151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 70756 + ... + 212266.

It is an arithmetic number, because the mean of its divisors is an integer number (6675168211).

Almost surely, 2^20025363121 is an apocalyptic number.

20025363121 is the 141511-st square number.

20025363121 is the 70756-th centered octagonal number.

It is an amenable number.

20025363121 is a deficient number, since it is larger than the sum of its proper divisors (141512).

20025363121 is an frugal number, since it uses more digits than its factorization.

20025363121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283022 (or 141511 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

Multiplying 20025363121 by its sum of digits (25), we get a square (500634078025 = 707555²).

The spelling of 20025363121 in words is "twenty billion, twenty-five million, three hundred sixty-three thousand, one hundred twenty-one".