20307620537 has 2 divisors, whose sum is σ = 20307620538. Its totient is φ = 20307620536.

The previous prime is 20307620477. The next prime is 20307620539. The reversal of 20307620537 is 73502670302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20140151056 + 167469481 = 141916^2 + 12941^2 .

It is a cyclic number.

It is not a de Polignac number, because 20307620537 - 2²⁶ = 20240511673 is a prime.

Together with 20307620539, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 20307620497 and 20307620506.

It is not a weakly prime, because it can be changed into another prime (20307620539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10153810268 + 10153810269.

It is an arithmetic number, because the mean of its divisors is an integer number (10153810269).

Almost surely, 2^20307620537 is an apocalyptic number.

It is an amenable number.

20307620537 is a deficient number, since it is larger than the sum of its proper divisors (1).

20307620537 is an equidigital number, since it uses as much as digits as its factorization.

20307620537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 35.

The spelling of 20307620537 in words is "twenty billion, three hundred seven million, six hundred twenty thousand, five hundred thirty-seven".