1921438302000 has 320 divisors, whose sum is σ = 7230315515904. Its totient is φ = 429841075200.

The previous prime is 1921438301987. The next prime is 1921438302019. The reversal of 1921438302000 is 2038341291.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1487314 + ... + 2460686.

Almost surely, 2^{1921438302000} is an apocalyptic number.

1921438302000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1921438302000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3615157757952).

1921438302000 is an abundant number, since it is smaller than the sum of its proper divisors (5308877213904).

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

1921438302000 is a wasteful number, since it uses less digits than its factorization.

1921438302000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973453 (or 973437 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 1921438302000 in words is "one trillion, nine hundred twenty-one billion, four hundred thirty-eight million, three hundred two thousand".