70020342640 has 20 divisors (see below), whose sum is σ = 162797296824. Its totient is φ = 28008137024.

The previous prime is 70020342541. The next prime is 70020342653. The reversal of 70020342640 is 4624302007.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 70020342599 and 70020342608.

It is a congruent 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, 437627062 + ... + 437627221.

Almost surely, 2^70020342640 is an apocalyptic number.

It is an amenable number.

70020342640 is an abundant number, since it is smaller than the sum of its proper divisors (92776954184).

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

70020342640 is a wasteful number, since it uses less digits than its factorization.

70020342640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875254296 (or 875254290 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

Adding to 70020342640 its reverse (4624302007), we get a palindrome (74644644647).

The spelling of 70020342640 in words is "seventy billion, twenty million, three hundred forty-two thousand, six hundred forty".