70030020021 has 16 divisors (see below), whose sum is σ = 101532203136. Its totient is φ = 42676992576.

The previous prime is 70030020007. The next prime is 70030020079. The reversal of 70030020021 is 12002003007.

It is not a de Polignac number, because 70030020021 - 2⁵ = 70030019989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70030020001) 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, 8712690 + ... + 8720723.

It is an arithmetic number, because the mean of its divisors is an integer number (6345762696).

Almost surely, 2^70030020021 is an apocalyptic number.

It is an amenable number.

70030020021 is a deficient number, since it is larger than the sum of its proper divisors (31502183115).

70030020021 is a wasteful number, since it uses less digits than its factorization.

70030020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17433532.

The product of its (nonzero) digits is 84, while the sum is 15.

Adding to 70030020021 its reverse (12002003007), we get a palindrome (82032023028).

The spelling of 70030020021 in words is "seventy billion, thirty million, twenty thousand, twenty-one".