19540125796 has 27 divisors (see below), whose sum is σ = 35163008139. Its totient is φ = 9500974848.

The previous prime is 19540125793. The next prime is 19540125797. The reversal of 19540125796 is 69752104591.

It is a happy number.

The square root of 19540125796 is 139786.

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 3496356900 + 16043768896 = 59130^2 + 126664^2 .

It is a super-2 number, since 2×19540125796² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19540125793) 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, 10343220 + ... + 10345108.

Almost surely, 2^19540125796 is an apocalyptic number.

19540125796 is the 139786-th square number.

It is an amenable number.

19540125796 is a deficient number, since it is larger than the sum of its proper divisors (15622882343).

19540125796 is an frugal number, since it uses more digits than its factorization.

19540125796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856 (or 1928 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 49.

Multiplying 19540125796 by its sum of digits (49), we get a square (957466164004 = 978502²).

The spelling of 19540125796 in words is "nineteen billion, five hundred forty million, one hundred twenty-five thousand, seven hundred ninety-six".