20970782430946 has 8 divisors (see below), whose sum is σ = 31456194047964. Its totient is φ = 10485384414960.

The previous prime is 20970782430931. The next prime is 20970782431007. The reversal of 20970782430946 is 64903428707902.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18875888040321 + 2094894390625 = 4344639^2 + 1447375^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 2506696 + ... + 6944428.

Almost surely, 2^{20970782430946} is an apocalyptic number.

20970782430946 is a deficient number, since it is larger than the sum of its proper divisors (10485411617018).

20970782430946 is a wasteful number, since it uses less digits than its factorization.

20970782430946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6800516.

The product of its (nonzero) digits is 36578304, while the sum is 61.

The spelling of 20970782430946 in words is "twenty trillion, nine hundred seventy billion, seven hundred eighty-two million, four hundred thirty thousand, nine hundred forty-six".