70020819 has 30 divisors (see below), whose sum is σ = 114276396. Its totient is φ = 40973520.

The previous prime is 70020817. The next prime is 70020827. The reversal of 70020819 is 91802007.

It is not a de Polignac number, because 70020819 - 2¹ = 70020817 is a prime.

It is a super-2 number, since 2×70020819² = 9805830186861522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70020792 and 70020801.

It is not an unprimeable number, because it can be changed into a prime (70020817) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2414497 + ... + 2414525.

Almost surely, 2^70020819 is an apocalyptic number.

70020819 is a deficient number, since it is larger than the sum of its proper divisors (44255577).

70020819 is an frugal number, since it uses more digits than its factorization.

70020819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 70020819 is about 8367.8443460667. The cubic root of 70020819 is about 412.1693835684.

The spelling of 70020819 in words is "seventy million, twenty thousand, eight hundred nineteen".