19953698995 has 4 divisors (see below), whose sum is σ = 23944438800. Its totient is φ = 15962959192.

The previous prime is 19953698987. The next prime is 19953699043. The reversal of 19953698995 is 59989635991.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 19953698995 - 2³ = 19953698987 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1995369895 + ... + 1995369904.

It is an arithmetic number, because the mean of its divisors is an integer number (5986109700).

Almost surely, 2^19953698995 is an apocalyptic number.

19953698995 is a deficient number, since it is larger than the sum of its proper divisors (3990739805).

19953698995 is an equidigital number, since it uses as much as digits as its factorization.

19953698995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990739804.

The product of its digits is 212576400, while the sum is 73.

The spelling of 19953698995 in words is "nineteen billion, nine hundred fifty-three million, six hundred ninety-eight thousand, nine hundred ninety-five".