20510124637 has 2 divisors, whose sum is σ = 20510124638. Its totient is φ = 20510124636.

The previous prime is 20510124631. The next prime is 20510124653. The reversal of 20510124637 is 73642101502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15200670681 + 5309453956 = 123291^2 + 72866^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20510124637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20510124599 and 20510124608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20510124631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10255062318 + 10255062319.

It is an arithmetic number, because the mean of its divisors is an integer number (10255062319).

Almost surely, 2^20510124637 is an apocalyptic number.

It is an amenable number.

20510124637 is a deficient number, since it is larger than the sum of its proper divisors (1).

20510124637 is an equidigital number, since it uses as much as digits as its factorization.

20510124637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 20510124637 in words is "twenty billion, five hundred ten million, one hundred twenty-four thousand, six hundred thirty-seven".