20005216776045 has 24 divisors (see below), whose sum is σ = 34675878432312. Its totient is φ = 10669396838400.

The previous prime is 20005216776007. The next prime is 20005216776053. The reversal of 20005216776045 is 54067761250002.

20005216776045 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 521 + 67 + 7 + 60 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1269313183044 + 18735903593001 = 1126638^2 + 4328499^2 .

It is not a de Polignac number, because 20005216776045 - 2⁷ = 20005216775917 is a prime.

It is a super-3 number, since 3×20005216776045³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9328485 + ... + 11270805.

It is an arithmetic number, because the mean of its divisors is an integer number (1444828268013).

Almost surely, 2^{20005216776045} is an apocalyptic number.

It is an amenable number.

20005216776045 is a deficient number, since it is larger than the sum of its proper divisors (14670661656267).

20005216776045 is a wasteful number, since it uses less digits than its factorization.

20005216776045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171213 (or 2171210 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 20005216776045 in words is "twenty trillion, five billion, two hundred sixteen million, seven hundred seventy-six thousand, forty-five".