1997031020 has 12 divisors (see below), whose sum is σ = 4193765184. Its totient is φ = 798812400.

The previous prime is 1997031019. The next prime is 1997031059. The reversal of 1997031020 is 201307991.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49925756 + ... + 49925795.

It is an arithmetic number, because the mean of its divisors is an integer number (349480432).

Almost surely, 2^1997031020 is an apocalyptic number.

1997031020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1997031020 is an abundant number, since it is smaller than the sum of its proper divisors (2196734164).

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

1997031020 is a wasteful number, since it uses less digits than its factorization.

1997031020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99851560 (or 99851558 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 1997031020 is about 44688.1530162078. The cubic root of 1997031020 is about 1259.2972944069.

The spelling of 1997031020 in words is "one billion, nine hundred ninety-seven million, thirty-one thousand, twenty".