20970391348 has 6 divisors (see below), whose sum is σ = 36698184866. Its totient is φ = 10485195672.

The previous prime is 20970391301. The next prime is 20970391363. The reversal of 20970391348 is 84319307902.

It can be written as a sum of positive squares in only one way, i.e., 20909738404 + 60652944 = 144602^2 + 7788^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20970391298 and 20970391307.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2621298915 + ... + 2621298922.

Almost surely, 2^20970391348 is an apocalyptic number.

It is an amenable number.

20970391348 is a deficient number, since it is larger than the sum of its proper divisors (15727793518).

20970391348 is a wasteful number, since it uses less digits than its factorization.

20970391348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5242597841 (or 5242597839 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 20970391348 in words is "twenty billion, nine hundred seventy million, three hundred ninety-one thousand, three hundred forty-eight".