20331143654 has 8 divisors (see below), whose sum is σ = 30864146040. Its totient is φ = 10043094976.

The previous prime is 20331143647. The next prime is 20331143669. The reversal of 20331143654 is 45634113302.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20331143654.

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 in 3 ways as a sum of consecutive naturals, for example, 61238219 + ... + 61238550.

It is an arithmetic number, because the mean of its divisors is an integer number (3858018255).

Almost surely, 2^20331143654 is an apocalyptic number.

20331143654 is a deficient number, since it is larger than the sum of its proper divisors (10533002386).

20331143654 is a wasteful number, since it uses less digits than its factorization.

20331143654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122476854.

The product of its (nonzero) digits is 25920, while the sum is 32.

Adding to 20331143654 its reverse (45634113302), we get a palindrome (65965256956).

The spelling of 20331143654 in words is "twenty billion, three hundred thirty-one million, one hundred forty-three thousand, six hundred fifty-four".