20654212454 has 4 divisors (see below), whose sum is σ = 30981318684. Its totient is φ = 10327106226.

The previous prime is 20654212421. The next prime is 20654212457. The reversal of 20654212454 is 45421245602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20654212457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5163553112 + ... + 5163553115.

It is an arithmetic number, because the mean of its divisors is an integer number (7745329671).

Almost surely, 2^20654212454 is an apocalyptic number.

20654212454 is a deficient number, since it is larger than the sum of its proper divisors (10327106230).

20654212454 is a wasteful number, since it uses less digits than its factorization.

20654212454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10327106229.

The product of its (nonzero) digits is 76800, while the sum is 35.

The spelling of 20654212454 in words is "twenty billion, six hundred fifty-four million, two hundred twelve thousand, four hundred fifty-four".