20194373254225 has 9 divisors (see below), whose sum is σ = 25041050696923. Its totient is φ = 16155480628120.

The previous prime is 20194373254177. The next prime is 20194373254229. The reversal of 20194373254225 is 52245237349102.

The square root of 20194373254225 is 4493815.

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., 7269974371521 + 12924398882704 = 2696289^2 + 3595052^2 .

It is not a de Polignac number, because 20194373254225 - 2⁹ = 20194373253713 is a prime.

It is a super-2 number, since 2×20194373254225² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20194373254229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 22019694 + ... + 22918456.

Almost surely, 2^{20194373254225} is an apocalyptic number.

20194373254225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20194373254225 is the 4493815-th square number.

20194373254225 is the 2246908-th centered octagonal number.

It is an amenable number.

20194373254225 is a deficient number, since it is larger than the sum of its proper divisors (4846677442698).

20194373254225 is an frugal number, since it uses more digits than its factorization.

20194373254225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797536 (or 898768 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 49.

Multiplying 20194373254225 by its sum of digits (49), we get a square (989524289457025 = 31456705²).

The spelling of 20194373254225 in words is "twenty trillion, one hundred ninety-four billion, three hundred seventy-three million, two hundred fifty-four thousand, two hundred twenty-five".