20523500029937 has 2 divisors, whose sum is σ = 20523500029938. Its totient is φ = 20523500029936.

The previous prime is 20523500029927. The next prime is 20523500030021. The reversal of 20523500029937 is 73992000532502.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20511152597776 + 12347432161 = 4528924^2 + 111119^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20523500029937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20523500029891 and 20523500029900.

It is not a weakly prime, because it can be changed into another prime (20523500029927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10261750014968 + 10261750014969.

It is an arithmetic number, because the mean of its divisors is an integer number (10261750014969).

Almost surely, 2^{20523500029937} is an apocalyptic number.

It is an amenable number.

20523500029937 is a deficient number, since it is larger than the sum of its proper divisors (1).

20523500029937 is an equidigital number, since it uses as much as digits as its factorization.

20523500029937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600, while the sum is 47.

The spelling of 20523500029937 in words is "twenty trillion, five hundred twenty-three billion, five hundred million, twenty-nine thousand, nine hundred thirty-seven".