20510124638 has 16 divisors (see below), whose sum is σ = 30931782336. Its totient is φ = 10199629440.

The previous prime is 20510124637. The next prime is 20510124653. The reversal of 20510124638 is 83642101502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20510124631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400370 + ... + 448682.

It is an arithmetic number, because the mean of its divisors is an integer number (1933236396).

Almost surely, 2^20510124638 is an apocalyptic number.

20510124638 is a deficient number, since it is larger than the sum of its proper divisors (10421657698).

20510124638 is a wasteful number, since it uses less digits than its factorization.

20510124638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49459.

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 20510124638 in words is "twenty billion, five hundred ten million, one hundred twenty-four thousand, six hundred thirty-eight".