19952519285 has 16 divisors (see below), whose sum is σ = 25393824000. Its totient is φ = 14997954816.

The previous prime is 19952519281. The next prime is 19952519401. The reversal of 19952519285 is 58291525991.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19952519285 - 2² = 19952519281 is a prime.

It is a super-2 number, since 2×19952519285² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19952519285.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19952519281) 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, 145025 + ... + 246854.

It is an arithmetic number, because the mean of its divisors is an integer number (1587114000).

Almost surely, 2^19952519285 is an apocalyptic number.

It is an amenable number.

19952519285 is a deficient number, since it is larger than the sum of its proper divisors (5441304715).

19952519285 is a wasteful number, since it uses less digits than its factorization.

19952519285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392500.

The product of its digits is 2916000, while the sum is 56.

The spelling of 19952519285 in words is "nineteen billion, nine hundred fifty-two million, five hundred nineteen thousand, two hundred eighty-five".