1900019031864 has 64 divisors (see below), whose sum is σ = 4761956390400. Its totient is φ = 631752502656.

The previous prime is 1900019031857. The next prime is 1900019031893. The reversal of 1900019031864 is 4681309100091.

It is a super-2 number, since 2×1900019031864² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52377397 + ... + 52413659.

It is an arithmetic number, because the mean of its divisors is an integer number (74405568600).

Almost surely, 2^{1900019031864} is an apocalyptic number.

It is an amenable number.

1900019031864 is an abundant number, since it is smaller than the sum of its proper divisors (2861937358536).

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

1900019031864 is a wasteful number, since it uses less digits than its factorization.

1900019031864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41684 (or 41680 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 42.

The spelling of 1900019031864 in words is "one trillion, nine hundred billion, nineteen million, thirty-one thousand, eight hundred sixty-four".