20510157124 has 24 divisors (see below), whose sum is σ = 36572331096. Its totient is φ = 10061760000.

The previous prime is 20510157007. The next prime is 20510157167. The reversal of 20510157124 is 42175101502.

It can be written as a sum of positive squares in 4 ways, for example, as 5389028100 + 15121129024 = 73410^2 + 122968^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20510157092 and 20510157101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6967 + ... + 202654.

It is an arithmetic number, because the mean of its divisors is an integer number (1523847129).

Almost surely, 2^20510157124 is an apocalyptic number.

It is an amenable number.

20510157124 is a deficient number, since it is larger than the sum of its proper divisors (16062173972).

20510157124 is a wasteful number, since it uses less digits than its factorization.

20510157124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210087 (or 210085 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

Adding to 20510157124 its reverse (42175101502), we get a palindrome (62685258626).

The spelling of 20510157124 in words is "twenty billion, five hundred ten million, one hundred fifty-seven thousand, one hundred twenty-four".