19825502061 has 8 divisors (see below), whose sum is σ = 26596175200. Its totient is φ = 13135915152.

The previous prime is 19825502009. The next prime is 19825502069. The reversal of 19825502061 is 16020552891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19825502061 - 2⁷ = 19825501933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19825502069) 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 7 ways as a sum of consecutive naturals, for example, 20270986 + ... + 20271963.

It is an arithmetic number, because the mean of its divisors is an integer number (3324521900).

Almost surely, 2^19825502061 is an apocalyptic number.

It is an amenable number.

19825502061 is a deficient number, since it is larger than the sum of its proper divisors (6770673139).

19825502061 is a wasteful number, since it uses less digits than its factorization.

19825502061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40543115.

The product of its (nonzero) digits is 43200, while the sum is 39.

The spelling of 19825502061 in words is "nineteen billion, eight hundred twenty-five million, five hundred two thousand, sixty-one".