1990533633854 has 16 divisors (see below), whose sum is σ = 3021844592592. Its totient is φ = 983252663808.

The previous prime is 1990533633841. The next prime is 1990533633887. The reversal of 1990533633854 is 4583363350991.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1990533633793 and 1990533633802.

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, 8629892 + ... + 8857544.

It is an arithmetic number, because the mean of its divisors is an integer number (188865287037).

Almost surely, 2^{1990533633854} is an apocalyptic number.

1990533633854 is a deficient number, since it is larger than the sum of its proper divisors (1031310958738).

1990533633854 is a wasteful number, since it uses less digits than its factorization.

1990533633854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280411.

The product of its (nonzero) digits is 31492800, while the sum is 59.

The spelling of 1990533633854 in words is "one trillion, nine hundred ninety billion, five hundred thirty-three million, six hundred thirty-three thousand, eight hundred fifty-four".