20111494225 has 27 divisors (see below), whose sum is σ = 25261540369. Its totient is φ = 15883280000.

The previous prime is 20111494223. The next prime is 20111494237. The reversal of 20111494225 is 52249411102.

The square root of 20111494225 is 141815.

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

It can be written as a sum of positive squares in 4 ways, for example, as 10231929409 + 9879564816 = 101153^2 + 99396^2 .

It is not a de Polignac number, because 20111494225 - 2¹ = 20111494223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20111494223) 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 26 ways as a sum of consecutive naturals, for example, 80125350 + ... + 80125600.

Almost surely, 2^20111494225 is an apocalyptic number.

20111494225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20111494225 is the 141815-th square number.

20111494225 is the 70908-th centered octagonal number.

It is an amenable number.

20111494225 is a deficient number, since it is larger than the sum of its proper divisors (5150046144).

20111494225 is an frugal number, since it uses more digits than its factorization.

20111494225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 20111494225 in words is "twenty billion, one hundred eleven million, four hundred ninety-four thousand, two hundred twenty-five".