20530815273 has 24 divisors (see below), whose sum is σ = 29916737760. Its totient is φ = 13567011840.

The previous prime is 20530815241. The next prime is 20530815281. The reversal of 20530815273 is 37251803502.

It is a happy number.

20530815273 is a `hidden beast` number, since 2 + 0 + 53 + 0 + 81 + 527 + 3 = 666.

It is not a de Polignac number, because 20530815273 - 2⁵ = 20530815241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20530815073) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 789090 + ... + 814692.

It is an arithmetic number, because the mean of its divisors is an integer number (1246530740).

Almost surely, 2^20530815273 is an apocalyptic number.

It is an amenable number.

20530815273 is a deficient number, since it is larger than the sum of its proper divisors (9385922487).

20530815273 is a wasteful number, since it uses less digits than its factorization.

20530815273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26389 (or 26386 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 20530815273 in words is "twenty billion, five hundred thirty million, eight hundred fifteen thousand, two hundred seventy-three".