20512045654 has 4 divisors (see below), whose sum is σ = 30768068484. Its totient is φ = 10256022826.

The previous prime is 20512045649. The next prime is 20512045663. The reversal of 20512045654 is 45654021502.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5128011412 + ... + 5128011415.

It is an arithmetic number, because the mean of its divisors is an integer number (7692017121).

Almost surely, 2^20512045654 is an apocalyptic number.

20512045654 is a deficient number, since it is larger than the sum of its proper divisors (10256022830).

20512045654 is a wasteful number, since it uses less digits than its factorization.

20512045654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10256022829.

The product of its (nonzero) digits is 48000, while the sum is 34.

The spelling of 20512045654 in words is "twenty billion, five hundred twelve million, forty-five thousand, six hundred fifty-four".