20580236473 has 2 divisors, whose sum is σ = 20580236474. Its totient is φ = 20580236472.

The previous prime is 20580236461. The next prime is 20580236489. The reversal of 20580236473 is 37463208502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12957724224 + 7622512249 = 113832^2 + 87307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20580236473 is a prime.

It is a super-2 number, since 2×20580236473² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20580236423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10290118236 + 10290118237.

It is an arithmetic number, because the mean of its divisors is an integer number (10290118237).

Almost surely, 2^20580236473 is an apocalyptic number.

It is an amenable number.

20580236473 is a deficient number, since it is larger than the sum of its proper divisors (1).

20580236473 is an equidigital number, since it uses as much as digits as its factorization.

20580236473 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 20580236473 in words is "twenty billion, five hundred eighty million, two hundred thirty-six thousand, four hundred seventy-three".