19955393530 has 16 divisors (see below), whose sum is σ = 37810219680. Its totient is φ = 7562043792.

The previous prime is 19955393489. The next prime is 19955393537. The reversal of 19955393530 is 3539355991.

It is not an unprimeable number, because it can be changed into a prime (19955393537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52514004 + ... + 52514383.

It is an arithmetic number, because the mean of its divisors is an integer number (2363138730).

Almost surely, 2^19955393530 is an apocalyptic number.

19955393530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19955393530 is a deficient number, since it is larger than the sum of its proper divisors (17854826150).

19955393530 is a wasteful number, since it uses less digits than its factorization.

19955393530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105028413.

The product of its (nonzero) digits is 2460375, while the sum is 52.

The spelling of 19955393530 in words is "nineteen billion, nine hundred fifty-five million, three hundred ninety-three thousand, five hundred thirty".