20512222013503 has 4 divisors (see below), whose sum is σ = 22376969469288. Its totient is φ = 18647474557720.

The previous prime is 20512222013483. The next prime is 20512222013509. The reversal of 20512222013503 is 30531022221502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20512222013503 - 2¹⁷ = 20512221882431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20512222013509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932373727876 + ... + 932373727897.

It is an arithmetic number, because the mean of its divisors is an integer number (5594242367322).

Almost surely, 2^{20512222013503} is an apocalyptic number.

20512222013503 is a deficient number, since it is larger than the sum of its proper divisors (1864747455785).

20512222013503 is a wasteful number, since it uses less digits than its factorization.

20512222013503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1864747455784.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 20512222013503 in words is "twenty trillion, five hundred twelve billion, two hundred twenty-two million, thirteen thousand, five hundred three".