1700021812 has 6 divisors (see below), whose sum is σ = 2975038178. Its totient is φ = 850010904.

The previous prime is 1700021801. The next prime is 1700021861. The reversal of 1700021812 is 2181200071.

It can be written as a sum of positive squares in only one way, i.e., 1331228196 + 368793616 = 36486^2 + 19204^2 .

It is a super-2 number, since 2×1700021812² = 5780148322551526688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212502723 + ... + 212502730.

Almost surely, 2^1700021812 is an apocalyptic number.

It is an amenable number.

1700021812 is a deficient number, since it is larger than the sum of its proper divisors (1275016366).

1700021812 is a wasteful number, since it uses less digits than its factorization.

1700021812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425005457 (or 425005455 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 1700021812 is about 41231.3207646808. The cubic root of 1700021812 is about 1193.4882962693.

Adding to 1700021812 its reverse (2181200071), we get a palindrome (3881221883).

The spelling of 1700021812 in words is "one billion, seven hundred million, twenty-one thousand, eight hundred twelve".