19910412574 has 16 divisors (see below), whose sum is σ = 32171288688. Its totient is φ = 9187045632.

The previous prime is 19910412551. The next prime is 19910412601. The reversal of 19910412574 is 47521401991.

19910412574 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 19910412574.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5614 + ... + 199630.

It is an arithmetic number, because the mean of its divisors is an integer number (2010705543).

Almost surely, 2^19910412574 is an apocalyptic number.

19910412574 is a deficient number, since it is larger than the sum of its proper divisors (12260876114).

19910412574 is a wasteful number, since it uses less digits than its factorization.

19910412574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197979.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 19910412574 in words is "nineteen billion, nine hundred ten million, four hundred twelve thousand, five hundred seventy-four".