70020981 has 12 divisors (see below), whose sum is σ = 102566880. Its totient is φ = 46022760.

The previous prime is 70020967. The next prime is 70020991. The reversal of 70020981 is 18902007.

It is not a de Polignac number, because 70020981 - 2⁵ = 70020949 is a prime.

It is a super-2 number, since 2×70020981² = 9805875560404722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70020931) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54151 + ... + 55428.

It is an arithmetic number, because the mean of its divisors is an integer number (8547240).

Almost surely, 2^70020981 is an apocalyptic number.

70020981 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

70020981 is a deficient number, since it is larger than the sum of its proper divisors (32545899).

70020981 is a wasteful number, since it uses less digits than its factorization.

70020981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109656 (or 109653 counting only the distinct ones).

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

The square root of 70020981 is about 8367.8540259734. The cubic root of 70020981 is about 412.1697014329.

Adding to 70020981 its reverse (18902007), we get a palindrome (88922988).

The spelling of 70020981 in words is "seventy million, twenty thousand, nine hundred eighty-one".