19925661495 has 16 divisors (see below), whose sum is σ = 33756415200. Its totient is φ = 10001900544.

The previous prime is 19925661439. The next prime is 19925661499. The reversal of 19925661495 is 59416652991.

It is not a de Polignac number, because 19925661495 - 2⁹ = 19925660983 is a prime.

It is a super-3 number, since 3×19925661495³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19925661499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39069670 + ... + 39070179.

It is an arithmetic number, because the mean of its divisors is an integer number (2109775950).

Almost surely, 2^19925661495 is an apocalyptic number.

19925661495 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19925661495 is a deficient number, since it is larger than the sum of its proper divisors (13830753705).

19925661495 is a wasteful number, since it uses less digits than its factorization.

19925661495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78139874.

The product of its digits is 5248800, while the sum is 57.

The spelling of 19925661495 in words is "nineteen billion, nine hundred twenty-five million, six hundred sixty-one thousand, four hundred ninety-five".