19308492025 has 9 divisors (see below), whose sum is σ = 23943391663. Its totient is φ = 15446237800.

The previous prime is 19308492023. The next prime is 19308492121. The reversal of 19308492025 is 52029480391.

The square root of 19308492025 is 138955.

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., 6951057129 + 12357434896 = 83373^2 + 111164^2 .

It is not a de Polignac number, because 19308492025 - 2¹ = 19308492023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19308492023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 680880 + ... + 708670.

Almost surely, 2^19308492025 is an apocalyptic number.

19308492025 is the 138955-th square number.

19308492025 is the 69478-th centered octagonal number.

It is an amenable number.

19308492025 is a deficient number, since it is larger than the sum of its proper divisors (4634899638).

19308492025 is an frugal number, since it uses more digits than its factorization.

19308492025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55592 (or 27796 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 19308492025 in words is "nineteen billion, three hundred eight million, four hundred ninety-two thousand, twenty-five".