20505040835570 has 32 divisors (see below), whose sum is σ = 38517908849280. Its totient is φ = 7844573165440.

The previous prime is 20505040835567. The next prime is 20505040835581. The reversal of 20505040835570 is 7553804050502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2566211 + ... + 6898950.

It is an arithmetic number, because the mean of its divisors is an integer number (1203684651540).

Almost surely, 2^{20505040835570} is an apocalyptic number.

20505040835570 is a deficient number, since it is larger than the sum of its proper divisors (18012868013710).

20505040835570 is a wasteful number, since it uses less digits than its factorization.

20505040835570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9474610.

The product of its (nonzero) digits is 840000, while the sum is 44.

The spelling of 20505040835570 in words is "twenty trillion, five hundred five billion, forty million, eight hundred thirty-five thousand, five hundred seventy".