20533413505 has 16 divisors (see below), whose sum is σ = 26945856000. Its totient is φ = 14896863360.

The previous prime is 20533413499. The next prime is 20533413539. The reversal of 20533413505 is 50531433502.

It is not a de Polignac number, because 20533413505 - 2⁵ = 20533413473 is a prime.

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, 433905 + ... + 478894.

It is an arithmetic number, because the mean of its divisors is an integer number (1684116000).

Almost surely, 2^20533413505 is an apocalyptic number.

It is an amenable number.

20533413505 is a deficient number, since it is larger than the sum of its proper divisors (6412442495).

20533413505 is a wasteful number, since it uses less digits than its factorization.

20533413505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913224.

The product of its (nonzero) digits is 27000, while the sum is 31.

The spelling of 20533413505 in words is "twenty billion, five hundred thirty-three million, four hundred thirteen thousand, five hundred five".