70020012520 has 32 divisors (see below), whose sum is σ = 157575810600. Its totient is φ = 28002532608.

The previous prime is 70020012509. The next prime is 70020012521. The reversal of 70020012520 is 2521002007.

It can be written as a sum of positive squares in 4 ways, for example, as 48358648836 + 21661363684 = 219906^2 + 147178^2 .

It is not an unprimeable number, because it can be changed into a prime (70020012521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39466 + ... + 376294.

Almost surely, 2^70020012520 is an apocalyptic number.

It is an amenable number.

70020012520 is an abundant number, since it is smaller than the sum of its proper divisors (87555798080).

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

70020012520 is a wasteful number, since it uses less digits than its factorization.

70020012520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342037 (or 342033 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

Adding to 70020012520 its reverse (2521002007), we get a palindrome (72541014527).

The spelling of 70020012520 in words is "seventy billion, twenty million, twelve thousand, five hundred twenty".