19825492551 has 16 divisors (see below), whose sum is σ = 28328792064. Its totient is φ = 12300656544.

The previous prime is 19825492549. The next prime is 19825492567. The reversal of 19825492551 is 15529452891.

It is not a de Polignac number, because 19825492551 - 2¹ = 19825492549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19825492494 and 19825492503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19825492571) 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, 3880231 + ... + 3885336.

It is an arithmetic number, because the mean of its divisors is an integer number (1770549504).

Almost surely, 2^19825492551 is an apocalyptic number.

19825492551 is a deficient number, since it is larger than the sum of its proper divisors (8503299513).

19825492551 is a wasteful number, since it uses less digits than its factorization.

19825492551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7765630.

The product of its digits is 1296000, while the sum is 51.

The spelling of 19825492551 in words is "nineteen billion, eight hundred twenty-five million, four hundred ninety-two thousand, five hundred fifty-one".