19690157191911 has 16 divisors (see below), whose sum is σ = 26698689573120. Its totient is φ = 12904200992000.

The previous prime is 19690157191909. The next prime is 19690157191987. The reversal of 19690157191911 is 11919175109691.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 19690157191911 - 2¹ = 19690157191909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19690157191811) 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, 40423831 + ... + 40908023.

It is an arithmetic number, because the mean of its divisors is an integer number (1668668098320).

Almost surely, 2^{19690157191911} is an apocalyptic number.

19690157191911 is a deficient number, since it is larger than the sum of its proper divisors (7008532381209).

19690157191911 is a wasteful number, since it uses less digits than its factorization.

19690157191911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714006.

The product of its (nonzero) digits is 1377810, while the sum is 60.

The spelling of 19690157191911 in words is "nineteen trillion, six hundred ninety billion, one hundred fifty-seven million, one hundred ninety-one thousand, nine hundred eleven".