20510507073 has 24 divisors (see below), whose sum is σ = 32672013312. Its totient is φ = 11403522144.

The previous prime is 20510507041. The next prime is 20510507099. The reversal of 20510507073 is 37070501502.

It is not a de Polignac number, because 20510507073 - 2⁵ = 20510507041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20510507073.

It is not an unprimeable number, because it can be changed into a prime (20510507273) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1880065 + ... + 1890942.

It is an arithmetic number, because the mean of its divisors is an integer number (1361333888).

Almost surely, 2^20510507073 is an apocalyptic number.

It is an amenable number.

20510507073 is a deficient number, since it is larger than the sum of its proper divisors (12161506239).

20510507073 is a wasteful number, since it uses less digits than its factorization.

20510507073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3771061 (or 3771054 counting only the distinct ones).

The product of its (nonzero) digits is 7350, while the sum is 30.

The spelling of 20510507073 in words is "twenty billion, five hundred ten million, five hundred seven thousand, seventy-three".