19890952842674 has 16 divisors (see below), whose sum is σ = 31133793883968. Its totient is φ = 9513025119312.

The previous prime is 19890952842653. The next prime is 19890952842689. The reversal of 19890952842674 is 47624825909891.

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 7 ways as a sum of consecutive naturals, for example, 12541364 + ... + 14038080.

It is an arithmetic number, because the mean of its divisors is an integer number (1945862117748).

Almost surely, 2^{19890952842674} is an apocalyptic number.

19890952842674 is a deficient number, since it is larger than the sum of its proper divisors (11242841041294).

19890952842674 is a wasteful number, since it uses less digits than its factorization.

19890952842674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785649.

The product of its (nonzero) digits is 627056640, while the sum is 74.

The spelling of 19890952842674 in words is "nineteen trillion, eight hundred ninety billion, nine hundred fifty-two million, eight hundred forty-two thousand, six hundred seventy-four".