1943000396421 has 32 divisors (see below), whose sum is σ = 3123790064640. Its totient is φ = 1049420530944.

The previous prime is 1943000396413. The next prime is 1943000396423. The reversal of 1943000396421 is 1246930003491.

It is not a de Polignac number, because 1943000396421 - 2³ = 1943000396413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1943000396423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5450415 + ... + 5795948.

It is an arithmetic number, because the mean of its divisors is an integer number (97618439520).

Almost surely, 2^{1943000396421} is an apocalyptic number.

It is an amenable number.

1943000396421 is a deficient number, since it is larger than the sum of its proper divisors (1180789668219).

1943000396421 is a wasteful number, since it uses less digits than its factorization.

1943000396421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11246825.

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 1943000396421 in words is "one trillion, nine hundred forty-three billion, three hundred ninety-six thousand, four hundred twenty-one".