19500726025 has 27 divisors (see below), whose sum is σ = 26589478503. Its totient is φ = 14176760400.

The previous prime is 19500726001. The next prime is 19500726043. The reversal of 19500726025 is 52062700591.

The square root of 19500726025 is 139645.

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., 7020261369 + 12480464656 = 83787^2 + 111716^2 .

It is not a de Polignac number, because 19500726025 - 2²⁵ = 19467171593 is a prime.

It is a super-2 number, since 2×19500726025² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7679206 + ... + 7681744.

Almost surely, 2^19500726025 is an apocalyptic number.

19500726025 is the 139645-th square number.

19500726025 is the 69823-rd centered octagonal number.

It is an amenable number.

19500726025 is a deficient number, since it is larger than the sum of its proper divisors (7088752478).

19500726025 is an frugal number, since it uses more digits than its factorization.

19500726025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5110 (or 2555 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 19500726025 in words is "nineteen billion, five hundred million, seven hundred twenty-six thousand, twenty-five".