20505371235 has 32 divisors (see below), whose sum is σ = 35120736000. Its totient is φ = 10184996736.

The previous prime is 20505371207. The next prime is 20505371261. The reversal of 20505371235 is 53217350502.

It is not a de Polignac number, because 20505371235 - 2¹⁸ = 20505109091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20505371196 and 20505371205.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 592920 + ... + 626549.

It is an arithmetic number, because the mean of its divisors is an integer number (1097523000).

Almost surely, 2^20505371235 is an apocalyptic number.

20505371235 is a deficient number, since it is larger than the sum of its proper divisors (14615364765).

20505371235 is a wasteful number, since it uses less digits than its factorization.

20505371235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219555.

The product of its (nonzero) digits is 31500, while the sum is 33.

The spelling of 20505371235 in words is "twenty billion, five hundred five million, three hundred seventy-one thousand, two hundred thirty-five".