19860772825 has 12 divisors (see below), whose sum is σ = 24853300780. Its totient is φ = 15742848960.

The previous prime is 19860772823. The next prime is 19860772837. The reversal of 19860772825 is 52827706891.

It can be written as a sum of positive squares in 6 ways, for example, as 3171491856 + 16689280969 = 56316^2 + 129187^2 .

It is not a de Polignac number, because 19860772825 - 2¹ = 19860772823 is a prime.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (19860772823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3641454 + ... + 3646903.

Almost surely, 2^19860772825 is an apocalyptic number.

It is an amenable number.

19860772825 is a deficient number, since it is larger than the sum of its proper divisors (4992527955).

19860772825 is a wasteful number, since it uses less digits than its factorization.

19860772825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7288476 (or 7288471 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 19860772825 in words is "nineteen billion, eight hundred sixty million, seven hundred seventy-two thousand, eight hundred twenty-five".