20772217325 has 12 divisors (see below), whose sum is σ = 25772297268. Its totient is φ = 16608259200.

The previous prime is 20772217313. The next prime is 20772217351. The reversal of 20772217325 is 52371227702.

It can be written as a sum of positive squares in 6 ways, for example, as 3996009796 + 16776207529 = 63214^2 + 129523^2 .

It is not a de Polignac number, because 20772217325 - 2⁸ = 20772217069 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193166 + ... + 280815.

It is an arithmetic number, because the mean of its divisors is an integer number (2147691439).

Almost surely, 2^20772217325 is an apocalyptic number.

20772217325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20772217325 is a deficient number, since it is larger than the sum of its proper divisors (5000079943).

20772217325 is a wasteful number, since it uses less digits than its factorization.

20772217325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475744 (or 475739 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 38.

The spelling of 20772217325 in words is "twenty billion, seven hundred seventy-two million, two hundred seventeen thousand, three hundred twenty-five".