1982198020 has 24 divisors (see below), whose sum is σ = 4541035968. Its totient is φ = 720799200.

The previous prime is 1982198017. The next prime is 1982198051. The reversal of 1982198020 is 208912891.

It is a super-6 number, since 6×1982198020⁶ (a number of 57 digits) contains 666666 as substring.

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, 4504776 + ... + 4505215.

It is an arithmetic number, because the mean of its divisors is an integer number (189209832).

Almost surely, 2^1982198020 is an apocalyptic number.

1982198020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1982198020 is an abundant number, since it is smaller than the sum of its proper divisors (2558837948).

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

1982198020 is a wasteful number, since it uses less digits than its factorization.

1982198020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9010011 (or 9010009 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 40.

The square root of 1982198020 is about 44521.8824849085. The cubic root of 1982198020 is about 1256.1717219940.

It can be divided in two parts, 1982 and 198020, that added together give a palindrome (200002).

The spelling of 1982198020 in words is "one billion, nine hundred eighty-two million, one hundred ninety-eight thousand, twenty".