20512045655 has 8 divisors (see below), whose sum is σ = 24615354384. Its totient is φ = 16409036800.

The previous prime is 20512045649. The next prime is 20512045663. The reversal of 20512045655 is 55654021502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20512045655 - 2⁸ = 20512045399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123095 + ... + 237015.

It is an arithmetic number, because the mean of its divisors is an integer number (3076919298).

Almost surely, 2^20512045655 is an apocalyptic number.

20512045655 is a deficient number, since it is larger than the sum of its proper divisors (4103308729).

20512045655 is a wasteful number, since it uses less digits than its factorization.

20512045655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149937.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 20512045655 in words is "twenty billion, five hundred twelve million, forty-five thousand, six hundred fifty-five".