20535721353 has 24 divisors (see below), whose sum is σ = 35894371968. Its totient is φ = 11044420992.

The previous prime is 20535721351. The next prime is 20535721369. The reversal of 20535721353 is 35312753502.

20535721353 is a `hidden beast` number, since 2 + 0 + 53 + 572 + 1 + 35 + 3 = 666.

It is not a de Polignac number, because 20535721353 - 2¹ = 20535721351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20535721351) 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, 9586101 + ... + 9588242.

It is an arithmetic number, because the mean of its divisors is an integer number (1495598832).

Almost surely, 2^20535721353 is an apocalyptic number.

It is an amenable number.

20535721353 is a deficient number, since it is larger than the sum of its proper divisors (15358650615).

20535721353 is a wasteful number, since it uses less digits than its factorization.

20535721353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19174373 (or 19174370 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 36.

The spelling of 20535721353 in words is "twenty billion, five hundred thirty-five million, seven hundred twenty-one thousand, three hundred fifty-three".