61070020 has 48 divisors (see below), whose sum is σ = 141523200. Its totient is φ = 21950720.

The previous prime is 61070003. The next prime is 61070029. The reversal of 61070020 is 2007016.

It is a junction number, because it is equal to n+sod(n) for n = 61069976 and 61070003.

It is not an unprimeable number, because it can be changed into a prime (61070029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18021 + ... + 21139.

It is an arithmetic number, because the mean of its divisors is an integer number (2948400).

Almost surely, 2^61070020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61070020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70761600).

61070020 is an abundant number, since it is smaller than the sum of its proper divisors (80453180).

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

61070020 is a wasteful number, since it uses less digits than its factorization.

61070020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3228 (or 3226 counting only the distinct ones).

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

The square root of 61070020 is about 7814.7309614599. The cubic root of 61070020 is about 393.8002801333.

Adding to 61070020 its reverse (2007016), we get a palindrome (63077036).

The spelling of 61070020 in words is "sixty-one million, seventy thousand, twenty".