61700020 has 12 divisors (see below), whose sum is σ = 129570084. Its totient is φ = 24680000.

The previous prime is 61699997. The next prime is 61700071. The reversal of 61700020 is 2000716.

It can be written as a sum of positive squares in 2 ways, for example, as 8088336 + 53611684 = 2844^2 + 7322^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61699967 and 61700003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1542481 + ... + 1542520.

It is an arithmetic number, because the mean of its divisors is an integer number (10797507).

Almost surely, 2^61700020 is an apocalyptic number.

It is an amenable number.

61700020 is an abundant number, since it is smaller than the sum of its proper divisors (67870064).

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

61700020 is a wasteful number, since it uses less digits than its factorization.

61700020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3085010 (or 3085008 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 61700020 is about 7854.9360277471. The cubic root of 61700020 is about 395.1498016442.

Adding to 61700020 its reverse (2000716), we get a palindrome (63700736).

The spelling of 61700020 in words is "sixty-one million, seven hundred thousand, twenty".