19910087656014 has 32 divisors (see below), whose sum is σ = 39886331577120. Its totient is φ = 6625670493312.

The previous prime is 19910087655979. The next prime is 19910087656057. The reversal of 19910087656014 is 41065678001991.

It is a happy number.

It is a super-2 number, since 2×19910087656014² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172179264 + ... + 172294860.

It is an arithmetic number, because the mean of its divisors is an integer number (1246447861785).

Almost surely, 2^{19910087656014} is an apocalyptic number.

19910087656014 is an abundant number, since it is smaller than the sum of its proper divisors (19976243921106).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19910087656014 is a wasteful number, since it uses less digits than its factorization.

19910087656014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163044.

The product of its (nonzero) digits is 3265920, while the sum is 57.

The spelling of 19910087656014 in words is "nineteen trillion, nine hundred ten billion, eighty-seven million, six hundred fifty-six thousand, fourteen".