1990298020000 has 60 divisors (see below), whose sum is σ = 4896431723106. Its totient is φ = 796119200000.

The previous prime is 1990298019971. The next prime is 1990298020013. The reversal of 1990298020000 is 208920991.

It can be written as a sum of positive squares in 5 ways, for example, as 429407605264 + 1560890414736 = 655292^2 + 1249356^2 .

It is a super-2 number, since 2×1990298020000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 49737451 + ... + 49777450.

Almost surely, 2^{1990298020000} is an apocalyptic number.

1990298020000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1990298020000 is an abundant number, since it is smaller than the sum of its proper divisors (2906133703106).

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

1990298020000 is an frugal number, since it uses more digits than its factorization.

1990298020000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99514931 (or 99514908 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 40.

The spelling of 1990298020000 in words is "one trillion, nine hundred ninety billion, two hundred ninety-eight million, twenty thousand".