19773900195 has 32 divisors (see below), whose sum is σ = 37135239168. Its totient is φ = 8795184768.

The previous prime is 19773900187. The next prime is 19773900199. The reversal of 19773900195 is 59100937791.

It is not a de Polignac number, because 19773900195 - 2³ = 19773900187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19773900199) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2541019 + ... + 2548788.

It is an arithmetic number, because the mean of its divisors is an integer number (1160476224).

Almost surely, 2^19773900195 is an apocalyptic number.

19773900195 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19773900195 is a deficient number, since it is larger than the sum of its proper divisors (17361338973).

19773900195 is a wasteful number, since it uses less digits than its factorization.

19773900195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5089859.

The product of its (nonzero) digits is 535815, while the sum is 51.

The spelling of 19773900195 in words is "nineteen billion, seven hundred seventy-three million, nine hundred thousand, one hundred ninety-five".